Science facts | Combined Answer Key - All Stages (NEP 2020) | Apex Edutech Solutions

🧠 AIMS TODAY – Science Facts Challenge

Combined Answer Key with Explanations (NEP 2020)

Foundation Stage (Grades 1–2)

Q	Correct Answer	Explanation
1	Eyes	Eyes help us to see objects, colors, and people around us.
2	Dog	Dogs grow, breathe, and need food, so they are living things.
3	Cow	Cows give us milk which is healthy for our body.
4	Sun	The Sun gives light and heat to Earth.
5	Leaf	Leaves are light, so they float on water.
6	Root	Roots grow under the soil and absorb water.
7	Winter	Winter season is very cold.
8	Ears	Ears help us hear sounds.
9	Fish	Fish live in water and breathe through gills.
10	Car	A car does not grow or breathe, so it is non-living.
11	Water	Plants need water to grow.
12	Nose	Nose helps us smell different things.
13	Circle	A circle is a round shape.
14	Fire	Fire gives heat.
15	Apple	Apple is a fruit.
16	Bird	Birds have wings to fly.
17	Day	Sunlight is seen during the day.
18	Pillow	Pillows are soft.
19	Tongue	Tongue helps us taste food.
20	Tree	Trees grow naturally.
21	Snake	Snakes crawl on the ground.
22	Sweater	Sweaters keep us warm.
23	Leaf	Leaves make food for plants.
24	Stone	Stone is heavy.
25	Cup	A cup is used to drink water.

Preparatory Stage (Grades 3–5)

Q	Correct Answer	Explanation
1	Oxygen	Oxygen is needed for breathing.
2	Leaf	Leaves prepare food by photosynthesis.
3	Solid	Solids have a fixed shape.
4	Mercury	Mercury is closest to the Sun.
5	Lungs	Lungs help in breathing.
6	Sun	Sun gives heat and light.
7	Cow	Cows eat plants.
8	Iron	Iron is attracted to magnets.
9	Ears	Ears help us hear.
10	Water	Water flows and has no shape.
11	Oxygen	Fire needs oxygen to burn.
12	Heart	Heart pumps blood.
13	Rotation of Earth	Earth rotates causing day and night.
14	Leaf	Leaf floats on water.
15	Rice	Rice gives energy.
16	Hen	Hens lay eggs.
17	Brain	Brain controls thinking.
18	Oxygen	Plants release oxygen.
19	Square	Square has four equal sides.
20	Gravity	Gravity pulls objects down.
21	Root	Roots absorb water.
22	Solar	Solar energy is renewable.
23	Clock	Clock shows time.
24	Ice	Ice melts on heating.
25	Eyes	Eyes help us see.

Middle Stage (Grades 6–8)

Q	Correct Answer	Explanation
1	Friction	Friction opposes the motion between two surfaces in contact.
2	Nitrogen	Nitrogen forms about 78% of Earth’s atmosphere.
3	Mitochondria	Mitochondria release energy and are called the powerhouse of the cell.
4	Chemical Energy	Food stores energy in chemical form.
5	Mercury	Mercury is the only metal liquid at room temperature.
6	Earth’s Rotation	Rotation of Earth causes day and night.
7	Cerebellum	The cerebellum controls balance and coordination.
8	Convex Mirror	Convex mirrors give a wide view, used as rear-view mirrors.
9	Vitamin D	Sunlight helps our body produce Vitamin D.
10	White Blood Cells	They protect our body from diseases.
11	Oxygen	Oxygen is required for respiration.
12	Evaporation	Liquid water changes into vapour during evaporation.
13	Saturn	Saturn is famous for its rings.
14	Loamy Soil	Loamy soil is best for growing crops.
15	Ampere	Ampere is the unit of electric current.
16	Wind Energy	Wind is a renewable natural resource.
17	Stem	Stem transports food and water in plants.
18	Newton	Newton proposed the laws of motion.
19	Carbon Dioxide	CO₂ is a major greenhouse gas.
20	Ears	Ears help in maintaining body balance.
21	Kinetic Energy	Moving objects possess kinetic energy.
22	Crust	The crust is the outermost layer supporting life.
23	Copper	Copper is a good conductor of electricity.
24	Condensation	Condensation forms clouds.
25	Iris	Iris controls the amount of light entering the eye.

Secondary Stage (Grades 9–10)

Q	Correct Answer	Explanation
1	Ohm’s Law	It states that current is directly proportional to voltage.
2	Neutron	Neutrons have no electric charge.
3	Exothermic Reaction	Energy is released in exothermic reactions.
4	Liver	The liver detoxifies harmful substances.
5	Carbon Dioxide	CO₂ is used in fire extinguishers.
6	½mv²	This formula represents kinetic energy.
7	Dispersion	White light splits into colors by dispersion.
8	Acetic Acid	Vinegar contains acetic acid.
9	AB+	AB+ blood group can receive blood from all groups.
10	Valence Electrons	They decide chemical properties of elements.
11	Jupiter	Jupiter has the strongest gravity.
12	Photosynthesis Equation	It shows how plants prepare food.
13	Sodium	Sodium is highly reactive.
14	Pituitary Gland	It controls other endocrine glands.
15	Stratosphere	The ozone layer is present here.
16	Watt	Watt measures power.
17	Concave Mirror	It can form real and inverted images.
18	Gravitational Force	Gravity keeps planets in orbit.
19	Sublimation	Solid changes directly to gas.
20	Medulla	Controls involuntary actions.
21	Geothermal Energy	It comes from Earth’s internal heat.
22	Chlorine	Used to purify drinking water.
23	Vitamin K	Helps in blood clotting.
24	Generator	Converts mechanical energy to electrical energy.
25	Boyle’s Law	Explains pressure–volume relationship of gases.

📘 Prepared by AIMS TODAY – Apex Edutech Solutions
NEP 2020 • Competency-Based Learning