Science ~ Matter Unit ~ CA ~ practice

Which lists the three sources in order of, MOST reliable to the LEAST reliable?

• chef blog, newspaper article, scientific paper

• scientific paper, newspaper article, chef blog

When a candle burns, a chemical reaction occurs changing wax and oxygen into carbon dioxide and water vapor. The average temperature of the candle-room system INCREASES.

Which statement best completes a statement about the transfer of energy in this chemical reaction?

• Endothermic, because more thermal energy is ABSORBED than released

• Exothermic, because more thermal energy is RELEASED than absorbed.

An ice pack is activated and placed on a person's wrist. After the resulting chemical reaction, the average temperature on the hands - ice pack system is LOWER.

Which statement best completes a statement about the ice packs system in the transfer of energy in this chemical reaction?

• Endothermic, because more thermal energy is ABSORBED than released.

• Exothermic, because more thermal energy is RELEASED than absorbed.

Think about eating and digestion as a model for what happens during chemical reactions. When you eat foods, the foods undergo chemical reactions.

What can you say about the PRODUCTS after digestion compared to the "reactants" (food) that you ate?

• The total number of atoms after digestion is LESS than the total number of atoms before digestion,

• The total number of atoms after digestion is EQUAL to the total number atoms before digestion.

Kamal is stuck in the house on a hot day. The air conditioning system is broken, so he does online research to find another way to cool down the house. One source advises to open all of the windows, although it also warns that this idea may not always work.

In which of the following situations would it be most recommended to open all the house's windows?

• When the temperature inside is HIGHER, since HEAT flows from WARMER to COOLER areas.

• When temperature inside is HIGHER, since HEAT flows from COOLER to WARMER areas.

What two categories are NATURAL RESOURCES divided into?

• renewable and nonrenewable

• inexpensive and expensive

To predict the time and location of volcanic eruptions and earthquakes, scientist use what TECNOLOGY?

• seismograph

• thermometer

Meteor Strikes, volcanic eruptions and earthquakes:

• cause FAST, sudden changes to earth's surface.

• Have a SLOW, gradual impact on earth's surface.

Weathering, erosion, and deposition are all considered:

• SLOW processes

• FAST processes

When objects transfer energy through TOUCH, that process is called?

• conduction

• radiation