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Plants and Light

In this worksheet, students will discover that light is of vital importance to a plant.

'Plants and Light' worksheet

Key stage:  KS 2

Curriculum topic:   Plants

Curriculum subtopic:   Requirements for Life and Growth

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

One of the most important things a plant needs to grow well is light. Unlike animals, plants can make their own food, and they use sunlight energy to do this. A plant that is kept out of the light will actually starve to death.

Sunlight shining through leaves

In this worksheet you can explore what you know about plants and their important relationship with light.

Which part of a plant captures the energy of the sun?

the roots

the stem

the leaves

the flowers

Why don't many smaller plants grow on the floor of a forest?

Forest in autumn

the soil is too shallow

there isn't enough water

the plants can't grow through the dead leaves

the big trees block the light

Why do the leaves of a tree spread out?

to keep the rain off the tree

to discourage insects

to catch as much sunlight as possible

to shelter the tree from the wind

Why do the lower branches of a tree sometimes have very few leaves?

the upper branches stop light getting through

the lower branches die

animals eat them

What happens to a plant that is kept in the dark? (select two answers)

its leaves become yellow

its roots grow out of the ground

it becomes weak and spindly

it produces extra leaves

Some plants grow on the bottom of ponds. Do they need light to grow?

yes

no

  • Question 1

Which part of a plant captures the energy of the sun?

CORRECT ANSWER
the leaves
EDDIE SAYS
A plant's leaves are its food factories, storing the energy of the sun in sugars - the plant's food.
  • Question 2

Why don't many smaller plants grow on the floor of a forest?

Forest in autumn

CORRECT ANSWER
the big trees block the light
EDDIE SAYS
Not enough light gets through to the floor of the forest to provide energy for other plants to grow.
  • Question 3

Why do the leaves of a tree spread out?

CORRECT ANSWER
to catch as much sunlight as possible
EDDIE SAYS
The leaves of a tree grow so that they will catch as much sunlight as possible. That's because sunshine is their source of energy and the more they capture, the bigger and faster they'll grow.
  • Question 4

Why do the lower branches of a tree sometimes have very few leaves?

CORRECT ANSWER
the upper branches stop light getting through
EDDIE SAYS
The tree doesn't grow leaves where the light can't reach. If the upper branches were pruned the tree would grow new leaves on its lower branches.
  • Question 5

What happens to a plant that is kept in the dark? (select two answers)

CORRECT ANSWER
its leaves become yellow
it becomes weak and spindly
EDDIE SAYS
A plant that is kept in the dark soon becomes unhealthy. If it stays in the dark for too long it will die. The leaves lose their green colour (which is vital in helping plants make their food) and it grows taller 'searching' for the light.
  • Question 6

Some plants grow on the bottom of ponds. Do they need light to grow?

CORRECT ANSWER
yes
EDDIE SAYS
All plants need light to grow, even ones that grow underwater. If the water was too dark and muddy the plants would die.
---- OR ----

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