Which of the following statements is true about scientific theories?

Scientific theories are never proven they just have much supporting evidence and explain the “why”..

Scientific theories will become scientific laws and will never change.

Scientific theories become hypotheses and will be changed over time.

Scientific theories summarize patterns found in nature and explain how things happen.

Why are scientific models important?

They help visualize things that are very complex, very large, or very small.

They prove scientific theories.

They make it harder to understand things.

What is the real safety rule here?

Always follow your teacher's instructions and textbook directions exactly.

Always use unbreakable glassware.

Never do experiments that involve flames or hot objects.

Which of the following is an example of a safe laboratory procedure?

tying back long hair and loose clothing

eating or drinking from laboratory glassware

touching hot objects with your bare hands

testing an odor by directly inhaling the vapor

Which of the following clocks offers the most precision?

a clock with a hand to measure the hour, a hand to measure the minutes, and a hand to measure the seconds

a clock with only one hand to measure the hour

a clock with only one hand to measure the minutes

a clock with a hand to measure the hour and a hand to measure the minutes

How do scientists communicate the results of investigations?

by publishing articles in scientific journals

by giving talks at scientific conferences

How do scientists who speak different languages make their data understandable to one another?

They all use SI (Systeme International/metric system) of measurement

They all use different systems of measurement.

They communicate through a universal translator.

According to the nebular theory, the solar system formed from

gravity pulling particles of dust and gas together

large, thin cloud of dust and gas.

The following statement is TRUE about terrestrial planets.

They have a rocky surface or a crust and an iron core

They are much larger than the other planets

Which of the following is the most likely reason that ancient observers believed that Earth was the center of the universe?

Objects in the sky appear to circle around Earth.

The Earth seemed to move on its axis.

Earth's motions are only recently known because of high-powered telescopes.

Ancient observers believed the universe was stationary with no movement.

What will happen to the relative amounts of hydrogen and helium in the sun over the next few billion years?

Hydrogen will decrease and helium will increase.

Hydrogen will increase and helium will decrease.

Both hydrogen and helium will decrease.

Both hydrogen and helium will remain the same.

What is the eventual fate of a star like the Sun, after it exhausts its nuclear fuel?

It transforms into a white dwarf and gradually cools over billions of years.

It expands into a red giant and then collapses into a black hole.

It undergoes a supernova explosion, scattering its outer layers into space.

It remains stable as a main-sequence star for an indefinite period.

How do astronomers primarily classify stars based on their characteristics?

By their color, temperature, and brightness

By their distance from Earth and luminosity

By their composition and spectral characteristics

The hottest stars in the sky appear

Blue, they give off the most energy

Red, they give off the most energy

Red, they give off the least energy

Blue, they give off the least energy

The sun remains stable over time because

nuclear fusion in its core balances out gravitational forces trying to collapse it

All stars remain on the main sequence.....

for about 90 % of their lifetimes

Which kind of star is most likely to spend the longest time on the main sequence?

a yellow medium mass star like the sun

Physical Science Midterm Exam Practice

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9th Grade

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Practice Problem

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Medium

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NGSS

HS-PS4-1, HS-ESS1-2, HS-ESS1-1

+20

Standards-aligned

kerly way

Used 1+ times

FREE Resource

100 questions

Show all answers

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Look at the figure. What kind of graph do you call this?

bar graph

line graph

circle graph

none of the above

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the terms below describes the systematic study of the structure and behavior of the physical and natural world through observation, experimentation, and the testing of theories against the evidence obtained?

measurement

curiosity

science

technology

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-3

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Science and technology are related to each other. Which of the statements below best describes the relationship?

Technology is a branch of natural science.

Science is a branch of technology.

Advances in science may lead to advances in technology and vice versa.

Science and technology are not related.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which area of Physical Science studies the nature of the universe?

Chemistry

Physics

Biology

Astronomy

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-2

NGSS.HS-ESS1-3

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What would be the unit used to measure the mass of an object?

grams

meters

Liters

Degrees Celsius

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which part of the scientific method requires that we use our senses?

making observations

analyzing data

drawing conclusions

revising a hypothesis

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What happens when the results of an experiment do not support the original hypothesis of the experiment?

The scientist gives up and starts an investigation on a new topic.

The data must be incorrect and are thrown out.

The hypothesis is revised.

The data are altered so that they support the original hypothesis.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS3-4

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Physical Science Midterm Exam Practice

100 questions

Look at the figure. What kind of graph do you call this?

Which of the terms below describes the systematic study of the structure and behavior of the physical and natural world through observation, experimentation, and the testing of theories against the evidence obtained?

Science and technology are related to each other. Which of the statements below best describes the relationship?

Which area of Physical Science studies the nature of the universe?

What would be the unit used to measure the mass of an object?

Which part of the scientific method requires that we use our senses?

What happens when the results of an experiment do not support the original hypothesis of the experiment?

Which term below is a scientific statement that explains “how" things happen in nature?

In science, the variable that is being purposefully changed and tested by the scientist, is called:

Which of the following statements is true about scientific theories?

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