What do plants need?

Which of the following is best for watering plants?

• tomato juice

• distilled water

• tap water

• fertilizer

What may happen if a plant does not get enough fertilizer?

• it may get diseases

• insects may attack it

• it may be weak

• it may not produce good fruits

I can see some pests under the leaves of my plant. Now, my plant is not growing well. Which element does my plant need?

• nitrogen

• phosphorus

• potassium

• boron

The green colour is fading from my plants? Which element do they need?

• nitrogen

• phosphorus

• potassium

• boron

Look at the picture. What is the variable in this experiment?

• plant pot

• windows

• air

• water

Look at the picture. What is the variable in this experiment?

• water

• fertilizer

• fruit juice

• air

Look at the picture. What is the variable in this experiment?

• metal

• plastic

• water

• pot material

Look at the picture. What are the constants in this experiment?

• plant

• soil

• amount of water

• pot material

Look at the picture. Which of the following could be a hypothesis for this experiment?

• Plants grow faster with more water.

• Plants grow faster in plastic pots.

• I think that the plant in the metal pot will grow but the plant in the plastic pot will die.

Look at the picture. Which of the following could be a hypothesis for this experiment?

• Plants do not like water.

• Plants near open windows grow more quickly than plants near closed windows.

• More water makes plants grow faster.