Unit 1 Review

In this list, which substance can be classfied as a chemical?

salt

You notice that red litmus paper turns blue in the presence of a base. This would be a(n)

observation

If a can of regular Coke sinks in a bucket of water, and diet Coke floats, then it is likely they have different densities. This would be a(n)

hypothesis

Which of the following is a measurement of temperature in the metric system?

degrees Celsius

The metric unit for volume is the

liter

A value of 345 g is a measure of

mass

The amount og space occupied by a substance is its 

volume

The measurement of the gravitational pull on an object is its

weight

Significant figures are important because they indicate

the certain and estimated digits in a measurement

Which of these contains the designated CORRECT number of significant figures?

156,000 - 3 significant figures

In which of the following is the metric unit paired with its correct abbreviation?

microgram / mcg

Which of the following is the largest unit?

kilometer

The cubic centimeter (cm³ or cc) has the same volume as a

milimeter

The ratio of the mass of a substance to its volume is its

density

Which one of the following substances will flota in gasoline, which has a density of 0.66 g/mL?

balsa wood (density = 0.16 g/mL)

The primary substances of which all other things are composed are

elements

Which of the follwing is a property of a solid?

The particles are very close together

Which of the following is a physical property of both liquids and gases?

has randomly arranged particles

Which of the following would NOT be a physical change?

burning gasoline in a lawnmower

Which of the following is a chemical change?

baking soda fizzing in vinegar

The phrase “ability to do work” is a definition of

energy

The energy stored in the chemical bonds of a carbohydrate molecule is

potential energy

The energy of motion is refeered to as

kinetic energy

In which of the following wold the particles move most rapidly?

steam at 110 degrees celsius

The dietary calorie (Cal) is equal to

1000 calories

The specific heat of a substance is the amount of heat needed to

raise the temperature of 1g of the substance by 1 degree celsius

Raising the temperature of 10.0 g of water from 10.0 degrees celsius to 20.0 degrees celsius requires 100.0 cal of energy, while raising the temperature of 10.0 g of aluminum from 10.0 degrees celsius from 20.0 degrees celsius requires 22 cal. More calories are required to heat the water because

water has a larger specific heat than aluminum

The specific heat of copper is 0.0920 cal/g degrees celsius, and the specific heat of silver is 0.0562 cal/g degrees celsius. If 100 cal of heat is added to one g of each metal at 25 degrees celsius, what is the expected result?

The silver will reach a higher temperature

Which of thse does NOT involve a change of state?

pouriing water into a vacuum-insulated bottle

Which of the following does NOT represent a step on the heating curve of water?

The temperature of steam cannot exceed 100 degrees celsius