Unit 1
Good scientific explanations are backed up by which of the following?
Observations that can be tested
_________________, is a chemical property of iron.
Rusting
An atom with more electrons than protons carries a _________.
negative charge
everything that moves needs a ________ to get it moving.
force
How long does it take the Earth to rotate on its axis?
24 hours
Which of the following tools should be used to examine closely the legs of an insect?
hand lens
Explain the difference between heterogeneous mixtures and homogeneous mixtures.
A heterogeneous mixture is something that you do not mix completely. Homogeneous mixtures are mixtures that are the same throughout. Their parts are evenly mixed together but you can’t see their different parts.
Which of the following is an example of static electricity?
Socks taken out of the clothes dryer stick together
The juggler on the right is tired because he is using more force to throw and catch heavier objects. He is showing us which Newton's Law?
Newton's Second Law
What is the only planet in the solar system known to support life?
Earth
What are the steps of the Scientific Method?
Observation, Question, Hypothesis, Plan, Experiment, Data, Conclusion
Some mixtures have particles that are smaller than the particles in a suspension, but larger than the particles in a solution. These mixtures are called _____________
Colloids
These cause invisible waves in the air?
vibrations
Which ride teaches us about inertia, speed, and acceleration?
roller coaster
Which is the correct order of names for a space rock as it falls from space to land on Earth's surface?
meteoroid, meteor, meteorite
What is measurement
The process of using tools to observe an object’s physical properties like mass volume, temperature, etc.
What should you look for to identify a chemical change?
color change, bubbling and fizzing, light production, smoke, texture, and presence of heat.
These waves make up what we call ______?
sound
The action of an apple falling is caused by what?
gravity
Most asteroids in our solar system are found…
in a belt between Mars and Jupiter
Which of these BEST represents scientific inquiry?
The results can be repeated by you and others.
The amount of space that something takes up.
volume
Frequency of a sound determines its _______
pitch
The action of a car stopping is caused by what?
friction
Which planet takes the longest time to make one revolution around the sun?
Neptune