📘 Class 7 – Science
Q. Define physical change.
Ans: A physical change is a change in which no new substance is formed.
Q. What is matter?
Ans: Matter is anything that has mass and occupies space.
Q. Define fertilization.
Ans: Fertilization is the fusion of male and female gametes.
Q. What is photosynthesis?
Ans: Plants make food using sunlight.
Q. What is chlorophyll?
Ans: Green pigment in plants.
Q. What is temperature?
Ans: Measure of hotness or coldness.
Q. What is acid?
Ans: Substance with sour taste.
Q. What is speed?
Ans: Distance per time.
Q. Reflection of light?
Ans: Bouncing back of light.
Q. Vertebrates?
Ans: Animals with backbone.
Q. Unit of temperature?
Ans: Celsius
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is respiration?
Ans: Respiration is the process of releasing energy from food.
Q. Define physical change.
Ans: A physical change is a change in which no new substance is formed.
Q. What is combustion?
Ans: Combustion is a chemical process in which a substance burns in the presence of oxygen.
Q. Define excretion.
Ans: Excretion is the removal of waste products from the body.
Q. What are microorganisms?
Ans: Microorganisms are very small living organisms not visible to the naked eye.
Q. What is nutrition?
Ans: Nutrition is the process by which organisms take in food and utilize it.
Q. Define rusting.
Ans: Rusting is the slow oxidation of iron in the presence of air and moisture.
Q. What are veins?
Ans: Veins are blood vessels that carry blood towards the heart.
Q. What is nutrition?
Ans: Nutrition is the process of taking food and using it for growth and energy.
Q. Why do living organisms need food?
Ans: They need food for energy, growth, repair and survival.
Q. What are nutrients?
Ans: Nutrients are useful substances present in food.
Q. Name two main nutrients.
Ans: Carbohydrates and proteins are main nutrients.
Q. Which nutrient gives energy?
Ans: Carbohydrates give energy.
Q. Which nutrient helps in growth?
Ans: Proteins help in growth.
Q. What is photosynthesis?
Ans: Photosynthesis is the process by which plants make food.
Q. Which organisms make their own food?
Ans: Green plants make their own food.
Q. What are autotrophs?
Ans: Autotrophs make their own food.
Q. What are heterotrophs?
Ans: Heterotrophs depend on others for food.
Q. Process of breathing called?
Ans: Respiration
Q. Green pigment in plants?
Ans: Chlorophyll
Q. Unit of temperature?
Ans: Degree Celsius
Q. Force that pulls objects down?
Ans: Gravity
Q. Heat transfer through solids?
Ans: Conduction
Q. Blood vessels carrying blood away from heart?
Ans: Arteries
Q. Largest planet?
Ans: Jupiter
Q. What is evaporation?
Ans: Liquid to gas
Q. Which acid in stomach?
Ans: Hydrochloric acid
Q. Plant breathing pores?
Ans: Stomata
Q. Define physical change.
Ans: A physical change is a change in which no new substance is formed.
Q. What is matter?
Ans: Matter is anything that has mass and occupies space.
Q. Define fertilization.
Ans: Fertilization is the fusion of male and female gametes.
Q. What is photosynthesis?
Ans: Plants make food using sunlight.
Q. What is chlorophyll?
Ans: Green pigment in plants.
Q. What is temperature?
Ans: Measure of hotness or coldness.
Q. What is acid?
Ans: Substance with sour taste.
Q. What is speed?
Ans: Distance per time.
Q. Reflection of light?
Ans: Bouncing back of light.
Q. Vertebrates?
Ans: Animals with backbone.
Q. Unit of temperature?
Ans: Celsius
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is photosynthesis? (Class 7)
Ans: Photosynthesis is the process by which green plants prepare food using sunlight.
Q. Define evaporation. (Class 7)
Ans: Evaporation is the process of liquid changing into vapour at any temperature.
Q. State Newton's first law. (Class 7)
Ans: An object remains at rest or in motion unless acted upon by an external force.
Q. What is respiration?
Ans: Respiration is the process of releasing energy from food.
Q. Define physical change.
Ans: A physical change is a change in which no new substance is formed.
Q. What is combustion?
Ans: Combustion is a chemical process in which a substance burns in the presence of oxygen.
Q. Define excretion.
Ans: Excretion is the removal of waste products from the body.
Q. What are microorganisms?
Ans: Microorganisms are very small living organisms not visible to the naked eye.
Q. What is nutrition?
Ans: Nutrition is the process by which organisms take in food and utilize it.
Q. Define rusting.
Ans: Rusting is the slow oxidation of iron in the presence of air and moisture.
Q. What are veins?
Ans: Veins are blood vessels that carry blood towards the heart.