Matter, Acids and Bases, and Water Properties STAAR Practice

What property of water allows insects to walk on its surface?

• Adhesion

• Cohesion

• Surface tension

• Viscosity

Tags

NGSS.MS-PS2-5

How does cohesion contribute to the formation of water droplets?

• It causes water molecules to repel each other

• It allows water molecules to stick to other surfaces

• It causes water molecules to stick together

• It decreases the surface tension of water

Tags

NGSS.MS-ESS2-4

Which of the following is a characteristic of a heterogeneous mixture?

• Uniform composition throughout

• Components are not visibly distinguishable

• Components are visibly distinguishable

• Cannot be separated by physical means

What is the pH range of acids?

• 0 to 7

• 7 to 14

• Exactly 7

• 7 to 10

Which of the following statements is true about bases?

• They have a pH less than 7

• They turn red litmus paper blue

• They are sour in taste

• They are non-reactive with acids

How does adhesion affect the transport of water in plants?

• It prevents water from moving upward

• It allows water to stick to plant tissues

• It causes water to evaporate quickly

• It decreases the water's surface tension

Which of the following best explains why water has a high surface tension?

• Strong adhesive forces between water molecules

• Strong cohesive forces between water molecules

• Weak cohesive forces between water molecules

• Weak adhesive forces between water molecules

How can you distinguish between a homogeneous and a heterogeneous mixture?

• By checking if the mixture can be separated by physical means

• By observing if the components are visibly distinguishable

• By measuring the pH of the mixture

• By determining if the mixture is a solid or liquid

What observable phenomenon is a result of water's adhesive properties?

• Water forming droplets on a leaf

• Water forming a meniscus in a graduated cylinder

• Water boiling at 100°C

• Water freezing at 0°C

Which of the following scenarios best illustrates the concept of surface tension?

• A paperclip floating on water

• Sugar dissolving in tea

• Oil spreading on water

• Salt settling at the bottom of a glass