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Chemistry Midterm #1 (S12025)

Last updated 8 months ago

45 questions

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Question 45

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What is the first action if a chemical spills?

Inform the teacher immediately

Use paper towels

Clean it up yourself

Ignore and continue working

What is the proper way to smell a chemical?

Sniff directly from the container

Waft it towards your nose

Hold it close to your face

Take a deep breath

How should you dispose of chemicals after an experiment?

Follow the teacher's disposal instructions

Pour them down the sink

Mix with water and discard

Throw them in the trash

What should you do before starting an experiment?

Skip to the experiment

Check social media

Ask your friends for help

Read the lab instructions carefully

What is the metric unit for length?

second

liter

meter

kilogram

How many millimeters are in a centimeter?

1000

100

10

1

What metric unit measures volume?

liter

joule

gram

meter

How many grams are in a kilogram?

1

10

100

1000

What is the base unit for mass in the metric system?

degree

liter

meter

gram

How many centimeters are in a meter?

10

1

1000

100

What is the first step in the scientific method?

Form a hypothesis.

Ask a question or identify a problem.

Analyze the results.

Conduct an experiment.

Which of these is an example of a hypothesis?

All plants need sunlight.

Plants grow faster with more sunlight.

Water makes plants grow.

Plants are green.

What does a control group do in an experiment?

Changes every time in the study.

Is not relevant to the results.

Tests the hypothesis directly.

Serves as a standard for comparison.

What does it mean to analyze data?

Writing down observations.

Making the results look good.

Interpreting and evaluating collected information.

Just collecting numbers.

What is a scientific theory?

A well-substantiated explanation of phenomena.

A law proven without evidence.

A guess that is untested.

A single experiment outcome.

What phase of matter has a definite shape and volume?

Plasma

Solid

Liquid

Gas

What occurs during condensation?

Liquid turns to gas

Gas turns into liquid

Gas turns to solid

Solid turns to liquid

What does convection transfer?

Heat through direct contact

Heat through fluid movement

Heat through vibrations

Heat through sunlight

Which method transfers heat through contact?

Conduction

Insulation

Convection

Radiation

What phase has no definite shape or volume?

Gas

Plasma

Solid

Liquid

What occurs during sublimation?

Liquid to gas

Solid to liquid

Solid to gas without melting

Gas to liquid

What is the primary mode of heat transfer in space?

Conduction

Radiation

Absorption

Convection

What is a mixture?

A solution of solids

A chemical change

A pure substance only

A combination of two or more substances

Which process separates components of a mixture?

Chromatography

Filtration

Evaporation

Distillation

What happens during evaporation?

Solid changes to liquid

Liquid changes to gas

Temperature remains constant

Gas changes to liquid

What is temperature a measure of?

States of matter

Mass of an object

Amount of heat energy

Average kinetic energy of particles

Which process absorbs heat from surroundings?

Endothermic

Evaporation

Chromatography

Exothermic

What does heat refer to?

State of matter

Transfer of thermal energy

Temperature of a system

Amount of substance

What increases when heat is added to a substance?

Mass

Volume

Temperature

Density

Which describes an endothermic reaction?

Temperature increases

Light is emitted

Heat is absorbed

Heat is released

What does evaporation involve?

Liquid turning into vapor

Gas turning to liquid

Solid melting

Mixing substances

Temperature decreases

Mass decreases

Temperature stays the same

Temperature increases

Change in temperature

Mass of the substance

Heat energy absorbed or released

Specific heat capacity

Specific heat capacity

Change in temperature

Heat energy transferred

Mass of the substance

Heat energy transferred

Change in temperature

Mass of the substance

Specific heat capacity

Specific heat capacity

Mass of the substance

Change in temperature

Heat transferred

How many centimeters are in 2 meters?

2,000 cm

2.0 cm

200 cm

20 cm

Convert 5 grams to kilograms.

0.005 kg

0.5 kg

0.05 kg

50 kg

How many liters are in 750 milliliters?

75 L

7.5 L

0.75 L

0.075 L

Convert 3 meters to centimeters.

300 cm

30 cm

3,000 cm

30,000 cm

How many kilograms are in 1,500 grams?

150 kg

0.15 kg

1.5 kg

15 kg

Convert 250 milliliters to liters.

2500 L

0.25 L

25 L

2.5 L

How many centimeters are in 5.5 meters?

5500 cm

550 cm

55 cm

5,500 cm

Convert 10 grams to kilograms.

0.1 kg

0.1 g

1 kg

0.01 kg

How many liters are in 1,200 milliliters?

12 L

0.12 L

120 L

1.2 L