# Review For Test #1

19 Questions | Total Attempts: 154  Settings  • 1.
Why did scientist agree to use the SI measurement units worldwide instead of the units common at each of their own locations?
• 2.
Whichof the following words isclosest in meaning to the word concept?
• A.

Plan

• B.

Question

• C.

Idea

• D.

Solution

• 3.
In the sentence, "Scientists include both constant and changing parameters in their experiments," what doe the word parameter mean?
• A.

Rules, limits or boundaries

• B.

Value used to dfine something

• C.

Environment of surroundings

• D.

Procedure in an experiment

• 4.
What is the first step you should take if someone is cut with broken glass during an experiment?
• A.

Apply first aid

• B.

Clean up the class

• C.

Complete the experiment

• D.

Make sure you are safe

• 5.
What tool might a scientist use for an experiment about the mass of objects?
• A.

• B.

Celcius thermometer

• C.

Electronic scale

• D.

Meterstick

• 6.
Which of the following should be avoided in the area where an experiment is taking place?
• A.

Tying long hair back in a ponytail

• B.

Keeping information from previous experiments on the work area

• C.

Wearing safety goggles that fit snugly over your eyes

• D.

Wearing heat-resistant gloves if an open flame is used

• 7.
What is the density of an object with a mass of 100.8 g and a volume of 144 cm3?
• A.

700 g/cm3

• B.

70 g/cm3

• C.

7 g/cm3

• D.

0.7 g/cm3

• 8.
What is the density of an object with a mass of 89.5 g and a volume of 75.1 mL?
• A.

1.0 g/mL

• B.

1.19 g/mL

• C.

2.19 g/mL

• D.

6721.45 g/mL

• 9.
When a prefix is put in front of a base unit in the metric system, what does the prefix do to the base unit?
• 10.
What does the prefix "c" mean in the metric system?
• 11.
How many mm long is a line that measures 18 cm?
• 12.
Convert:    23.98 hm into _____________ mm
• 13.
Convert: 72.9 g into _____________kg
• 14.
What unit do we use to measure the speed of a bicycle?
• 15.
Measurements that have good accuracy and good precision are called ________________ by scientists.
• 16.
A __________ is a way to represent an object or a system to help us understand somehing that is not familiar to us.
• 17.
In science, a ____________ is an explanation that combines many hypotheses and observations. (e.g. gravity)
• 18.
Only when a model correctly predicts the results of many different experiements can a ______ be constructed to summarize results and obervations of many experiements. It tells how things work.
• 19.
In science, measuring the L x W x H helps you find the _____________ of an object.
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