A bean plant's soil stays dry and it gets no water for a long time. What is likely to happen?

• Its leaves stay firm and green.
• Its leaves droop and may dry out.
• Its leaves grow larger and greener.

Which list names the three growth conditions compared in this lesson?

• Water, light, and a suitable temperature
• Water, darkness, and a suitable temperature
• Light, dry soil, and a suitable temperature

Two bean plants are the same height. This means they must be equally healthy.

This chart shows made-up test results. The light-grown bean plant is 12 cm tall. The dark-grown plant is 6 cm tall. Which is taller?

• The plant grown in darkness
• The plant grown in the light
• Both plants have equal height

Leo leaves a young bean plant outside during a freezing snowstorm. What might happen?

• Its leaves will grow faster in freezing snow.
• Its roots will protect its leaves from freezing.
• Its leaves may be damaged by freezing.

For a fair test of watering, how many growth conditions should Zara change at a time?

Class A waters bean plants in light. Class B gives similar plants no water and keeps them dark. The plants grow differently. Can the classes tell whether water alone caused the difference?

• No. Both water and light changed between the groups.
• Yes. The plants are similar, so the test is fair.
• Yes. The watered plants grew differently, so water caused the change.

Anna's bean plant gets enough water and stays at a suitable temperature, but it is kept in complete darkness. Why might its leaves become pale?

• It needs more water to grow.
• It needs more warmth to grow.
• It needs light to make food.