Science Quiz

What is the scientific method?

• A systematic way of investigating and testing hypotheses through experimentation and observation.

• A process of randomly selecting an answer without any reasoning

• A way of proving whatever you want to be true

• A method for making wild guesses without any evidence

Explain diffusion in simple terms.

• The movement of particles from an area of low concentration to an area of high concentration.

• Diffusion occurs only in liquids and not in gases or solids.

• Diffusion is the process of particles staying in the same area without moving.

• The movement of particles from an area of high concentration to an area of low concentration.

Define osmosis.

• Movement of solvent molecules from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane

• The process of water moving from an area of high concentration to an area of low concentration through a semi-permeable membrane

• Movement of solute molecules from an area of higher solute concentration to an area of lower solute concentration through a semi-permeable membrane

• The movement of solute molecules from an area of lower solute concentration to an area of higher solute concentration without a semi-permeable membrane

What is a hypotonic solution?

• A solution with higher solute concentration than another solution

• A solution with no solute concentration

• A solution with equal solute concentration to another solution

• A solution with lower solute concentration than another solution

Explain the concept of hypertonic solution.

• A hypertonic solution causes cells to divide rapidly.

• A hypertonic solution causes cells to shrink due to water leaving the cell and moving into the surrounding solution.

• A hypertonic solution causes cells to expand due to water entering the cell from the surrounding solution.

• A hypertonic solution has no effect on the size of cells.

How does active transport work in cells?

• By using passive diffusion to move molecules with their concentration gradient

• By using energy from ATP to move molecules against their concentration gradient

• By using energy from glucose to move molecules against their concentration gradient

• By using osmosis to move molecules across the cell membrane

What happens to a cell in a hypotonic solution?

• It divides into two smaller cells

• It swells and may burst

• It remains unchanged

• It shrinks and becomes dehydrated

Describe the effect of a hypertonic solution on a cell.

• The cell will expand

• The cell will remain the same size

• The cell will burst

• The cell will shrink or shrivel

Give an example of diffusion in everyday life.

• Mixing sugar in coffee

• The smell of perfume spreading in a room.

• Lighting a candle

• Pouring water into a glass

Explain osmosis using a simple analogy.

• Osmosis is like a balloon deflating when air is let out

• Osmosis is similar to a plant absorbing sunlight

• Osmosis can be explained using the analogy of a sponge soaking up water. Just like how a dry sponge absorbs water when placed in a bowl of water, osmosis is the movement of water molecules through a membrane to balance the concentration on both sides.

• Osmosis is like a rock absorbing water from a stream