Chemistry

Non-living things are characterized by their inability to

• grow

• move

• change shape

• dissolve

• evaporate

A physical change does NOT involve

• alteration in appearance

• change in chemical composition

• change in state

• mixing substances

• dissolving

In the kinetic theory of matter, particles in a solid

• are far apart

• vibrate in place

• move freely

• collide elastically

• have negligible volume

An example of an exothermic reaction is

• baking soda and vinegar

• melting ice

• photosynthesis

• combustion of fuels

• dissolving salt

A catalyst is defined as a substance that

• alters products

• is consumed in a reaction

• speeds up a reaction

• increases activation energy

• requires high temperatures

The force exerted by gas molecules on the walls of a container is referred to as

• volume

• density

• pressure

• temperature

• mass

When gas particles are squeezed into a smaller space, the pressure

• decreases

• remain constant

• increases

• becomes negligible

• fluctuates unpredictably

The kinetic theory of matter states that particles in a gas

• are stationary

• vibrate slowly

• move rapidly

• are densely packed

• have a definite shape

An endothermic reaction

• releases heat

• absorbs heat

• has no heat change

• is a physical change

• occurs without energy

The main assumption of Boyle's Law is that

• pressure increases with temperature

• pressure decreases with volume

• pressure is constant

• temperature affects volume

• volume increases with pressure