Reviewer for First Quarter Examination in Science 7

Which of the following shows how particles behave when heated?

What can you say about the particles of liquid in contrast with a solid?

• A predictable pattern of movement.

• Less movement and are more tightly packed.

• The same amount of movement and spacing.

• More freedom to move and more space between them.

What is the characteristic of solid particles as seen in its particle model?

• Moving freely and spread far apart.

• Arranged in a specific pattern but with large gaps.

• Vibrating in place with minimal space between them.

• Flowing around each other and constantly changing positions.

Which happens if you mix juice powder with water?

• The juice powder will dissolve in water.

• The juice powder will form a layer.

• The juice powder will not dissolve in water.

• The juice powder will settle at the bottom of the water.

What can be a limitation of scientific model?

• They are never updated or improved.

• They are all based on real-world data.

• They are only used in physics, not other sciences.

• They cannot perfectly capture all the complexities of a system.

What resembles the Plum Pudding Model of the atom?

• A tiny, solid ball with negative charges stuck on the outside.

• A complex mathematical equation describing electron behavior.

• A miniature solar system with planets orbiting a central nucleus.

• A positively charged sphere with negatively charges scattered throughout.

In a solution, what do you call the substance in a larger amount?

• salt

• solute

• solvent

• sugar

In the 'Personal Space' mini activity, how did the space between students change as they went from solid to liquid to gas?

• It decreased slightly.

• It remained the same.

• It increased significantly.

• It completely disappeared.

Water is composed of two atoms of hydrogen and one atom of oxygen. Which of the following can be the particle model for water?

What can you say about the movement (speed) of the particles of solid, liquid, and gas based on this model?

• The speed of the particles is the same in all states of matter.

• Solid particles are the fastest to move compared to liquid and gas.

• Gas particles are the fastest among solids and liquids.

• The speed of the particles is not affected by temperature.