For an investigation a student poured a blue solution of CuSO 4 into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes. The student inferred that a chemical reaction occurred. What evidence supports this inference?

A dark solid formed on the zinc metal.

The zinc metal remained silver-colored and shiny

The CuSO 4 solution turned blue when the zinc metal was added.

Marie had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and pickle juice?

A chemical reaction produced a gas.

A chemical reaction produced a solid.

No chemical reaction took place.

Only a physical change happened.

A student mixes two clear liquids together. After a few minutes, a white powdery solid can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids –

have gone through a chemical change in which a new substance called a precipitate was produced.

were pure substances before they were mixed.

are toxic and should be handled with extreme caution.

have been stored too long and are no longer good.

A push or pull exerted on an object

A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

Balanced Forces, Constant Speed

Unbalanced Forces, Constant Speed

Unbalanced Forces, Acceleration

Which could be an example of an unbalanced force?

A baseball that has been thrown to home plate.

A plate sitting on a dining table

A ball at the top of a hill that is not moving

What is happening in this graph from point A to B?

The object is moving at a constant speed.

Semester Review Pre- AP 7th

Authored by Meredith Vera

Chemistry, Physics, Science

7th - 8th Grade

NGSS covered

Used 34+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Electrons have a _______ charge

positive

negative

neutral

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The positive particles of an atom are

electrons

positrons

neutrons

protons

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

an atom with atomic number 6 would have how many protons

cannot be determined

Particles in an atom that are neutral and have no charge are

negatrons

electrons

neutrons

protons

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the mass number?

the number of protons

the number of protons and neutrons

the number of neutrons

the number of protons and electrons

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

How many electron shells/levels does this atom have?

Number of electrons in Fluorine (F)

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Semester Review Pre- AP 7th

Electrons have a _______ charge

The positive particles of an atom are

an atom with atomic number 6 would have how many protons

Particles in an atom that are neutral and have no charge are

What is the mass number?

How many electron shells/levels does this atom have?

Number of electrons in Fluorine (F)

Number of neutrons in antimony (Sb)

Number of protons in strontium (Sr)

How many electrons are in Manganese (Mn) ?

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