Which part carries water and food around the plant?
Stem
100
What causes the roots to go down?
gravity
100
What is inside a seed?
food, baby plant
100
What is the hard, wooden stem of a tree called?
a trunk
100
Name a root that people eat.
carrot, beet, radish, potato
200
What do the roots do for a plant?
take water and minerals from the soil
hold the plant in place
200
What grid lines (marked by degrees) run north and south on a map?
longitude
200
What is the hard covering of a seed called?
seed coat
200
What part of the plant contains tiny tubes that carry food and water to the whole plant?
stem
200
Plants give off ___________________ when they make food (sugar) for the plant.
oxygen
300
Name the part that makes the food for the plant.
leaf (leaves)
300
Name three things that most plants need in their habitat to grow.
air (carbon dioxide)
sunlight
water
soil (nutrients)
300
Name two ways that seeds travel.
wind, animals, water, plants "throw" them
300
What is the name of the powder that helps a flower grow into a fruit to produce seeds?
pollen
300
What do plants take in through tiny holes in their leaves?
carbon dioxide
400
What is the purpose of the flower?
Flowers make the fruit and seeds.
400
How do stems respond to light?
They grow toward the light.
400
What is it called when a seed begins to grow? (sprouts)
germination
400
Explain the difference between a main stem and a secondary stem.
The main stem supports the plant and carries water from the roots around the plant. The secondary stems grow out from the main stem, support the leaves, and take water to the leaves.
400
What is the largest tree?
redwood
500
What are the green cells in the leaves called?
chlorophyll
500
A seed planted in soil can germinate in a dark cabinet if it
has ______ and ________.
water , warmth
500
What is a small plant called?
seedling
500
Explain how a plant makes its food with photosynthesis.
The plant uses green cells in the leaves, water from the soil, carbon dioxide from the air, and energy from the sun to make food.
500
True or False
Some leaves protect plants from being eaten by hungry animals.