Physical and Life Science Competition

What is the cytoskeleton made of?

• cells

• lipids

• membranes

• proteins

What do all ribosomes do?

• make proteins

• float in the cytoplasm

• attach themselves to membranes

• make organelles

What is a function of some vacuoles?

• to make proteins

• to store water

• to make sugar

• to harden the cell

Osmosis and diffusion are two examples of passive transport

• True

• False

Particles moving across a cell membrane with using energy is called passive transport.

• True

• False

Compounds can be broken down only by chemical changes.

• True

• False

When the temperature increase, the solubility of a gas increase.

• True

• False

If a spoonful of salt is mixed in a glass of water, what is the water called?

• solute

• solution

• solvent

• element

A colloid has properties of both suspensions and ...........................

• solutions.

• solvents.

• solutes.

• nonmetals

What is a pure substance made of two or more elements that are chemically combined called?

• element

• compound

• mixture

• solution