Plants Parts and Needs — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which plant grows the tallest of these choices?
A) A tall oak tree
B) A tiny grass blade
C) A small carrot
D) A short flower
Trees like oaks grow much taller than grass, carrots, or flowers because of strong woody trunks.
2. Which plant gives us food we eat from underground?
A) An apple tree
B) A carrot plant
C) A rose bush
D) A pine tree
A carrot is a root vegetable, so the part we eat grows under the soil.
3. What happens to a plant that gets too much water?
A) It grows extra flowers
B) It turns into a fish
C) Its roots may rot
D) It stops needing the sun
Too much water keeps roots too wet, so they rot and cannot feed the plant.
4. What do all plants need to make their own food?
A) Cold ice and snow
B) Loud music every day
C) Toys to play with
D) Sunlight, water, and air
Every plant uses sunlight, water, and air together to make food inside its leaves.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Trees have thick wooden stems called trunks.
Trunks are strong wooden stems that hold a tree up and carry water to leaves.
2. A flower plant is usually shorter than a tree.
Most flower plants are shorter than trees because they have soft, thin stems.
3. A plant with no sunlight for many days will turn pale.
Without sunlight, leaves cannot stay bright green and slowly turn pale or yellow.
4. A vegetable like a carrot grows under the soil.
Carrots are roots that grow down into the soil where they store food for the plant.
5. All plants, big or small, start life as a tiny seed.
From small flowers to giant trees, every plant begins as a tiny seed in the soil.