Physical Science Study Guide Review

Which is an unintended consequence of the widespread use of pesticides on corn crops?

• Increased amount of corn grown each year

• The deaths of insects that feed on corn

• The rise of pesticide–resistant insects

• Decreased cost of producing corn

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NGSS.MS-LS2-4

1. Which best explains why nuclear reactions release more energy than chemical reactions?

• The forces holding the nucleus together are much stronger than the forces binding electrons to atoms

• Protons have a much higher mass than either neutrons or electrons.

• During a chemical reaction, some of the mass of the reactants is converted to energy.

• In nuclear reactions, the electrons in the atom are not involved in the transmutation.

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NGSS.HS-PS1-8

1. A student carries out a chemical reaction that produces a brown powder. How should the student measure the amount of product formed?

• Measure the amount of time it takes for the reaction to happen.

• Remove the product from the beaker and use a scale to find its mass.

• Measure the length of the powder across the bottom of the beaker.

• Record the change in temperature of the beaker.

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NGSS.MS-PS1-5

1. Which explains why a gas does not have a fixed shape?

• The particles have very high speeds.

• The particles are not compressible

• The particles are charged.

• The particles vibrate.

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NGSS.MS-PS1-4

1. What happens to the particles in water as the water is heated and turns to vapor?

• The particles move more quickly.

• The particles are destroyed

• The particles become smaller.

• The particles stop moving.

Tags

NGSS.MS-PS1-4

1. What happens to a glass of water as the average molecular kinetic energy of the water molecules increases?

• The water becomes more acidic.

• The water becomes warmer.

• The water becomes cooler.

• The water turns to ice.

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NGSS.MS-PS1-4

1. Which of the following is a chemical change?

• Wind breaking down a rock into smaller pieces

• A leaf falling off of a tree during a storm

• A screwdriver rusting when left in a pail of water

• A block of ice melting in the sun

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NGSS.MS-PS1-2

Why can gases and liquids both transmit heat by convection?

• Their particles are free to move away from each other.

• They both have a fixed volume.

• They both contain charged particles.

• Their particles both vibrate around fixed positions.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

1. How do elements change as you move to the right along a row in the periodic table?

• The atomic number decreases.

• The electronegativity decreases.

• The average atomic mass increases.

• The number of valence electrons decreases.

1. Which best describes the history of scientific knowledge?

• Scientific knowledge changes over time because new experiments are conducted and new data is introduced.

• Scientific knowledge changes as political conditions change.

• Scientific knowledge changes when different scientists become more popular.

• Scientific knowledge does not change because science is factual.

Tags

NGSS.MS-ESS3-5