What is a pure substance?

a single kind of matter that cannot be separated into other kinds of matter

Which of the following represents a hypothesis?

If plants are given water each day, then they will grow.

a substance made up of two or more different chemical elements combined

What is a Scientific Law?

A brief statement that summarizes past observation and predicts future ones

What is a hypothesis?

a tentative explanation of an observation

What is a scientific theory?

an explanation of the natural world that's supported by hypotheses & facts

What are characteristics of a solid?

atoms or molecules packed close toeach other in a fixed location

What are characteristics of gases?

gas atoms or molecules take up the entire volume of their container., gas atoms or molecules have a lot ofspace between them

What is the definition of matter?

anything that occupies space and has mass.

what is an amorphous solid?

atoms or molecules packed close together without a repeating order/chain

What are characteristics of liquids?

liquids assume the shape of their container, Atoms are packed pretty close together, free tomove relative to one another

What is a homogeneous mixture?

A mixture whose composition is uniform throughout

What is a heterogeneous mixture?

a mixture whose composition varies from oneregion to another.

What is the order of events in the scientific approach?

Observation, Hypothesis, Experiment, Scientific law, Scientific theory

what is a crystalline solid?

atoms or molecules packed close together in a repeating chain/order

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CHEM1314 Practice (S1)

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Answers

1
What is the simplest form of matter with distinctphysical and chemical properties that cannot bebroken down chemically?
Element
Ionic Bond
Compound
Atom
2
What is a pure substance?
a solution made up of more than one compound
a single kind of matter that cannot be separated into other kinds of matter
a molecule made up of two or more elements
3
Which of the following represents a hypothesis?
ethylene combines with water to form ethanol.
When wood burns, heat is given off
If plants are given water each day, then they will grow.
4
What is a compound?
A single element atom
The smallest building block of matter.
Anything that takes up space and has mass
a substance made up of two or more different chemical elements combined
5
What is a Scientific Law?
A brief statement that summarizes past observation and predicts future ones
An irrefutable fact that explains all of chemistry and the natural world.
A statement based off of ONE observation and/or experiment.
6
What is a hypothesis?
a unifying principle that explains a body of facts and/or laws based on it
A fact that states why something happened.
a tentative explanation of an observation
A brief statement that summarizes past observation and predicts future ones
7
What is a scientific theory?
an explanation of the natural world that's supported by hypotheses & facts
A brief statement that summarizepast observation and predicts future ones
An absolutely true explanation of all natural world phenomenons
8
What are characteristics of a solid?
atoms or molecules packed close toeach other in a fixed location
atoms or molecules packed close toeach other without definite shape
atoms or molecules spread far apart in a fixed location
9
What are characteristics of gases?
gas atoms or molecules take up the entire volume of their container.
Gas atoms/molecules are very close together and take up all the container.
Gas atoms/molecules have a lot of space btwn them and have 0 volume or mass
gas atoms or molecules have a lot ofspace between them
10
Which is an example of a homogeneous mixture?
dirt and water
vinegar
oil and water
milk
11
What is this law an example of? _______ of Conservation of Mass: "Matter cannot be created nor destroyed"
Scientific Law
Hypothesis
Scientific Theory
Observation
12
What is the definition of matter?
anything that occupies space and has mass.
Anything that occupies space and doesn't have mass
Anything visible that occupies space and has mass
Anything visible that occupies space and doesn't have mass
13
what is an amorphous solid?
a group of atoms or molecules that are tight together without volume
atoms or molecules packed close together without a repeating order/chain
a group of atoms or molecules that are spread far apart without repetition
14
What are characteristics of liquids?
Atoms are spread far from each other, free to move relative to one another
Liquids have a definite shape
liquids assume the shape of their container
Atoms are packed pretty close together, free tomove relative to one another
15
Which is an example of a heterogeneous mixture?
sugar water
coffee
sand in water
trail mix
16
What is a homogeneous mixture?
A mixture whose composition is uniform throughout
A mixture that only has one kind of element or compound
A mixture whose composition is uneven throughout
17
What is a heterogeneous mixture?
a mixture whose composition is uniform throughout.
A mixture made up of one compound or element
a mixture whose composition varies from oneregion to another.
18
What is the order of events in the scientific approach?
Observation, Hypothesis, Experiment, Scientific theory, Scientific law
Observation, Hypothesis, Experiment, Scientific law, Scientific theory
Experiment, Observation, Hypothesis, scientific law, scientific theory
Observation, Experiment, Hypothesis, Scientific law, Scientific theory
19
what is a crystalline solid?
atoms or molecules packed close together in a repeating chain/order
atoms or molecules spread far apart in a repeating chain/order

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