CWW Science - Half Term Examination - Grade 7

Surname

First & Other Names

Which blood component carries oxygen?

• Plasma
• White blood cells
• Red blood cells
• Platelets

The diagram shows a paper chromatography result with several colours separated. What does each spot represent?

• A different solvent
• A separate solute
• A piece of paper
• A pH level

Which change would make a solution more concentrated?

• Add more solute
• Remove water
• Add both solute and solvent
• A or B

Which metal is most reactive with dilute acid?

• Copper
• Gold
• Iron
• Potassium

What is the formula for speed?

• Speed = force × time
• Speed = distance ÷ time
• Speed = time ÷ distance
• Speed = energy ÷ mass

What happens to pressure if the area increases but force stays the same?

• Pressure increases
• Pressure stays the same
• Pressure decreases
• Pressure turns into force

What explains how perfume spreads across a room?

• Osmosis
• Air pressure
• Gravity
• Diffusion

What happens when light hits a mirror?

• Refraction
• Absorption
• Diffraction
• Reflection