Q: Which of the following numbers is correctly written in scientific notation?

$$0.000604 = 6.04 \times 10$$^{-4}$$

Question 1

Which of the following best defines 'chemistry'?

Accepted Answer

The study of composition, structure, properties, and reactions of matter.

Question 2

Which of the following is NOT considered matter?

Accepted Answer

Sunlight

Question 3

A chemical is best described as:

Accepted Answer

A substance that has the same composition and properties wherever found.

Question 4

Which of the following is an example of a chemical reaction occurring in everyday life?

Accepted Answer

A tablet dissolving and fizzing in water.

Question 5

Which statement about mass and weight is correct?

Accepted Answer

Mass is the quantity of matter in an object, while weight is the force of attraction between an object and other objects.

Question 6

Which of the following is NOT a chemical found in toothpaste?

Accepted Answer

Sunlight

Question 7

Which step in the scientific method involves proposing a possible explanation for an observation?

Accepted Answer

Hypothesis

Question 8

A scientist observes that a chemical tablet fizzes when placed in water. She proposes that the tablet contains a substance that reacts with water to produce gas. What is her proposal called?

Accepted Answer

Hypothesis

Question 9

If you run for 25 minutes on a treadmill and your trainer records this, what part of the scientific method is being performed?

Accepted Answer

Observation

Question 10

Which of the following is the correct way to write 54,000 in scientific notation?

Accepted Answer

$$5.4 	imes 10^5$

Question 11

A premature baby has a mass of 2518 grams. What is the place value of the digit '2' in this number?

Accepted Answer

Thousands

Question 12

Which of the following calculations will result in a negative number?

Accepted Answer

$$(-3) 	imes 2$$

Question 13

If 11 out of 35 babies born in a hospital are boys, what percentage of the newborns are boys? (Express your answer to the ones place.)

Accepted Answer

$$32\%$$

Question 14

Solve for $$a in $$the equation $$8 = a + 12.$$

Accepted Answer

$$a = -4$$

Question 15

Which of the following best describes a direct relationship as shown on a graph?

Accepted Answer

As one variable increases, the other increases.

Question 16

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$$0.000604 = 6.04 	imes 10$$^{-4}$$

Question 17

Which of the following is the correct solution for $$2x + 8 = 14$$?

Accepted Answer

$$x = 3$$

Question 18

If a scientist's hypothesis is not supported by experimental results, what should she do next?

Accepted Answer

Revise or reject the hypothesis based on the results.

Question 19

Which of the following is the correct way to express 0.021 in scientific notation?

Accepted Answer

$$2.1 	imes 10$$^{-2}$$

Question 20

A graph shows the volume of a gas in a balloon increasing as the temperature increases. What type of relationship does this represent?

Accepted Answer

Direct relationship

Chapter 1: Chemistry in Our Lives – Foundations for GOB Chemistry

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