Plants- Grade 6

How is plant growth different from animal growth?

• Animals never stop growing.

• Plants produce a set number of limbs.

• Plants never stop growing.

• Animals can grow an unlimited number of limbs.

What are the requirements for seed growth? Select all that apply.

• water

• soil

• heat

• photosynthesis

When will a seed begin to germinate?

• when it has heat

• when it has water

• when it has heat and water

• when it has energy

 

Which plant structure absorbs most of the water and nutrients needed from the soil?

• secondary roots

• tap roots

• fibrous roots

• root hairs

What are the important functions of roots? Select all that apply.

• Roots store minerals and carbohydrates for the plant.

• Roots are where cotyledons emerge.

• Roots hold the plant in place in the ground.

• Roots enable plants to spread over land areas.

What are cotyledons?

• root hairs

• part of the plant that stores food

• unborn offspring

• first leaves of a plant

Which organic materials are present in soil? Select all that apply.

• rocks

• a spider’s molted outer covering

• iron

• decaying leaf matter

What role do bacteria play in healthy soil?

• They provide stability for the plants in the soil.

• They help break down minerals in the soil into a form that plants can absorb.

• They help keep the soil loose enough for plant roots to grow.

• They hold tiny pockets of air so that roots can breathe.

Which element is necessary to make proteins for plant growth?

• nitrogen

• water

• hydrogen

• oxygen

Which plant structure enables the movement of water from the roots to the leaves?

• cambium

• petiole

• xylem

• phloem