Identify the false statement.

Potato plants with a jellyfish gene will glow when they need to be watered

Identify the false statement.

A scientific law fully explains a set of observations.

Which of these chemicals is definitely inorganic?

One that is made of nitrogen and phosphorus

A basketball has more mass than a golf ball because:

The basketball contains more matter.

A gas is a form of matter that

Takes the shape and volume of its container.

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Unit 1 Test: Chapter 1 & 2 Chemistry

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Answers

1
A compound
Can be physically separated into its elements.
Consist of two or more substance that are chemically combined
Has properties similar to those of its elements.
Is another name for an element
2
Which phase of matter has particles that constantly collide?
Gas
Plasma
Solid
Liquid
3
A hypothesis is
A proposed explanation for what is observed
A summary of the results of many experiments
A well-tested explanation for many observations
An observation recorded from an experiment
4
Identify the activity that belongs in the field of chemistry.
Analysis of a compound
All of the above
Developing medicines
Production of a new plastic
5
Homogeneous mixtures
Are always liquids.
Are known as solutions.
Have a composition that is fixed.
Consist of two or more phases.
6
Identify the false statement.
Potato plants with a jellyfish gene will glow when they need to be watered
Chemists work to develop more pest-resistant and disease-resistant plants
Bio diesel is a fossil fuel.
Chemistry plays a role to increase world's food supply & protect crops
7
A heterogeneous mixture example is only
A bowl of tomato soup
A bowl of chicken broth.
A bowl of salad with tomatoes
A bowl of cheese dip
8
Identify the false statement.
4 results of experiment to be accepted it must produce same result eachtime
A scientific law fully explains a set of observations.
Scientific method is a logical, systematic approach to solution of problem
The SM is repeated until a hypothesis either fits all the observed results
9
Which term does not fit with the others listed?
Gas
Liquid
Solid
Reactant
10
Identify the left side of the chemical equation: iron plus oxygen → iron oxide(rusting)
Iron oxide is a reactant.
Iron is a product
Oxygen is a product.
Iron + oxygen is a reactant
11
Which of the following is not a step for solving a numeric word problem?
Calculate
Conclude
Analyze
Evaluate
12
Which property below does not show an extensive property
Color
Volume
Weight
Mass
13
Which of these chemicals is definitely inorganic?
One that is made of nitrogen and phosphorus
One that is made of carbon and hydrogen
One that is made of carbon and oxygen
One that is made of nitrogen and carbon
14
A basketball has more mass than a golf ball because:
The basketball contains more matter.
The golf ball contains a different kind of matter.
The basketball takes up more space.
The golf ball has an indefinite composition.
15
A gas is a form of matter that
Is difficult to compress.
Has a definite volume.
Takes the shape and volume of its container.
Is generally a liquid or solid at room temperature.
16
Physical properties of a substance include
Color and odor.
All of the above.
Melting and boiling points.
Malleability.
17
Which steps of the scientific method involves stating a problem but not proposing an explanation for the problem
Scientific law
Hypothesis
Theory
Observation
18
Which of the following is not a part of the scientific method?
Hypothesizing
Experimenting
Calculate
Observing
19
All of the following are general characteristics of a substance in the liquid state except
Definite volume.
Able to flow
Definite shape
Not easily compressed
20
All are homogeneous mixtures except
Chocolate milk
Phenol red and calcium chlorid
Salt and pepper.
Hot tea.

Unit 1 Test: Chapter 1 & 2 Chemistry Flashcards | StudBud