Reviewer for First Quarter Examination in Science 7

Which of the following shows how particles behave when heated?

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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?

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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.