Plants: Growth & Needs — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A plant kept in a dark closet will most likely...
A) Grow taller and greener
B) Turn pale and droop
C) Make lots of new flowers
D) Grow faster than usual
Without sun, plants cannot make food and they weaken.
2. If you never water a plant, what will happen?
A) It will grow bigger
B) It will stay the same
C) It will dry up and die
D) It will make fruit
Plants need water to live, so they dry up without it.
3. A plant sealed in a jar with no air holes will...
A) Get stronger fast
B) Struggle to stay healthy
C) Grow more leaves
D) Make new seeds quickly
Plants use gases from air; no air means trouble.
4. Which plant will probably grow the best?
A) One with no sun
B) One with no water
C) One with sun, water, and soil
D) One locked in the dark
Healthy plants need sun, water, air, and good soil.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A plant with no sunlight cannot make food.
Leaves use sun to make food; no sun means no food.
2. A plant with no water will dry up.
Without water, plant cells shrink and the plant dies.
3. If soil has no nutrients, the plant may grow slowly.
Poor soil means less food minerals for the plant.
4. Too much cold can make a plant freeze.
Cold air can freeze a plant and hurt its leaves.
5. Giving a plant sun, water, and air helps it stay healthy.
Meeting all needs keeps plants strong and growing.