What information does a chemical formula provide?

The elements present and the ratios of their atoms

The physical state of a compound

The temperature at which a reaction occurs

The speed at which a chemical reaction occurs

Which statement best describes an exothermic reaction?

The reaction releases heat to the surroundings.

The reaction absorbs heat from the surroundings.

The reaction occurs spontaneously.

The reaction requires energy to proceed.

What is Newton's first law of motion?

An object in motion stays in motion unless acted upon by an external force.

Force equals mass times acceleration.

For every action, there is an equal and opposite reaction.

Velocity of an object remains constant unless acted upon by an external force.

What does the gravitational force between two objects depend on?

The masses of both objects and the distance between them

The tendency of an object to resist changes in its velocity

The energy of an object in motion

The speed of an object in motion

What does Newton's third law state?

For every action, there is an equal and opposite reaction.

Energy is neither created nor destroyed.

Force equals mass times acceleration.

An object at rest stays at rest unless acted upon by an external force.

What is kinetic energy?

The energy an object has due to its motion

The energy stored in an object due to its position

The energy lost due to friction

The energy transferred between objects

What does the law of conservation of energy state?

Energy cannot be created or destroyed, only transformed.

Energy is always lost as heat in a system.

Energy within a closed system decreases over time.

Energy transfer is always efficient.

What is a characteristic of all electromagnetic waves in a vacuum?

They all travel at the same speed.

They all have the same wavelength.

They all have the same frequency.

They all have the same amplitude.

What is the frequency of a wave?

The number of cycles per unit time

The distance between wave crests

The bending of waves as they enter a new medium at an angle

The absorption of light as it passes through a medium

The reflection of waves off a surface

The transmission of waves through a medium

What evidence supports the Big Bang theory?

The steady state of galaxy formation

What is an astronomical unit (AU)?

The average radius of the Earth's orbit around the Sun

The distance between Earth and the nearest star

The distance between Earth and the Sun

The distance light travels in one year

What causes the seasons on Earth?

The tilt of the Earth's rotational axis

The Earth's distance from the Sun

The Earth's orbital shape around the Sun

The rotation of the Earth around its axis

What is the main purpose of environmental regulations?

To decrease agricultural output

What is the most effective way to reduce carbon footprint?

Increase fossil fuel consumption

Decrease public transportation usage

What role do wetlands play in an ecosystem?

They act as natural water filters.

They increase thermal pollution

Which action can mitigate the effect of global warming?

Increasing use of air conditioners

What is the role of enzymes in biological reactions?

To change the products of the reaction

To provide energy for the reactions

What is the primary function of the chloroplast?

To capture light energy and convert it into chemical energy

MATHES WYTOPP SCIENCE REVIEW

Authored by Anonymous Anonymous

Science

9th - 12th Grade

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108 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best describes the law of conservation of mass?

Mass is neither created nor destroyed in a chemical reaction.

Mass can be converted into energy.

The mass of products in a chemical reaction is greater than the mass of the reactants.

The mass of reactants in a chemical reaction is always equal to the mass of the products.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an element?

A substance that can be broken down into simpler substances by chemical reactions.

A compound made up of two or more different elements.

A pure substance that cannot be broken down into simpler substances by chemical reactions.

A mixture of two or more substances that are not chemically combined.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a chemical reaction?

The process by which atomic nuclei are split or combined.

The process that changes one or more substances into one or more new substances.

The process of a substance changing from one phase to another.

The process of mixing two substances to form a solution.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a sign of a chemical change?

Boiling water

Dissolving sugar in water

Rusting of iron

Melting ice

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of a catalyst in a chemical reaction?

To increase the yield of the product

To decrease the reaction temperature

To speed up the reaction without being consumed

To act as a reactant in the reaction

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a chemical property?

Density

Solubility

Reactivity with acid

Melting point

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a balanced chemical equation, why must the number of atoms for each element be the same on both sides of the equation?

To satisfy the law of conservation of mass

To ensure that the reaction is exothermic

To ensure that the reaction is endothermic

To increase the rate of the reaction

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MATHES WYTOPP SCIENCE REVIEW

Which statement best describes the law of conservation of mass?

What is an element?

What is a chemical reaction?

Which of the following is a sign of a chemical change?

What is the purpose of a catalyst in a chemical reaction?

Which of the following is an example of a chemical property?

In a balanced chemical equation, why must the number of atoms for each element be the same on both sides of the equation?

What information does a chemical formula provide?

Which type of bond is formed by the sharing of electrons between atoms?

Which statement best describes an exothermic reaction?

Access all questions and much more by creating a free account

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