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Worksheets7th grade Chem quiz 1 practice
Total questions: 25
Worksheet time: 23mins
The variable that is changed on purpose is..
Constant
Control
Independent Variable
Dependent Variable
vanilla ice cream
vanilla ice cream with sprinkles
vanilla ice cream with hot fudge & caramel
True or False: elements AND compounds are pure substances.
True
False
Dry ice is solid carbon dioxide, or CO2. Dry ice may be used as a cooling agent and contains two oxygen atoms bonded to a carbon atom. Dry ice is a ___________________ .
pure substance
mixture
Instant coffee is made by dissolving a powder in hot water. Instant coffee is a ___________________ .
pure substance
mixture
Which of these are NOT example of matter?
solid
energy
liquid
forces
gas
What are mixtures?
different materials placed together but keeping their own properties
a mixture in which substances spread out evenly and will not settle
the degree to which a material will dissolve in another substance
the substance in a solution that has the greatest amount
the substance in a solution that has the least amount
What is a solution?
different materials placed together but keeping their own properties
a mixture in which substances spread out evenly and will not settle
the degree to which a material will dissolve in another substance
the substance in a solution that has the greatest amount
the substance in a solution that has the least amount
What state of matter does the picture below represent?
solid
liquid
gas
plasma
What is a Solid?
Matter that has a fixed shape and size.
Matter that has a fixed size and no fixed shape
Matter that has no fixed shape or size
Matter that has no fixed shape and size
The diagram shows arrangement of particles in a
Solid
Liquid
Gas
Define a liquid.
Matter that has fixed shape but no fixed volume
Matter that has fixed shape and fixed volume
Matter that has fixed volume, but no fixed shape
What is a gas?
Matter that has fixed shape but no fixed volume
Matter that has no fixed shape and no fixed volume
Matter that has no fixed shape but fixed volume
compounds
What state is represented in the gif?
Solid
Liquid
Gas
What is a claim?
Answers a question or problem
long and detailed paragraph
Explains why something happened
What is evidence ?
Answers a question
Anything you see, hear or read or experience that causes you to believe something is true.
Long and detailed paragraph
What is reasoning?
Answers a question
Explaining how evidence supports a claim
Used to prove something true or false
What is an example of a claim?
Mr. Smith likes Star Wars
In the fall, because of changes in the length of daylight and changes in temperature, the leaves stop their food-making process.
The data shows that when leaves are taken away from sunlight, they change colors.
What is an example of reasoning?
Honey is stored in hives.
Honeybees store their honey in hives.
Honeybees use hexagons to store the honey and pollen they bring to the hive.
What is an example of evidence?
Football players are 33% more likely to get injured than baseball players.
Football is more dangerous than baseball.
Baseball is a fun sport.
Why do we need evidence?
To answer a question
To show how and why
To prove our claim is true
Why do we need reasoning?
To show how and why
to answer a question
To prove your claim is true
