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Unit 1A
Unit 1B
Unit 1C
Unit 1D
Unit 1E
100
Motion is a change in the position of an object, and speed is one way to describe motion. What is speed? A. Any change over time in the motion or direction of a moving object B. A force that acts on you all the time C. The distance traveled and time D. The distance traveled and amount of force exerted
C. The distance traveled and time
100
What is used to guide a scientist's steps in investigations? A. variables B. experiments C. hypothesis D. scientific method
D. scientific method
100
The number of cubes that fit in an object or substance is how to measure the ________________ of matter. A. area B. volume C. mass D. density
B. volume
100
When do chemical properties change? A. during filtration B. during mixing C. during evaporation D. during chemical reactions
E. during chemical reactions
100
Scientists use the ______________ system of measurement, which is based on units of ten. The United States uses the standard units in the _______________ system. A. British, English B. metric, English C. English, British D. English, metric
B. metric, English
200
A scientist must look for connections between important variables to form a hypothesis. What is a hypothesis? A. a statement that can be answered without explanations B. a statement that can be tested to answer a question C. a question about an experiment D. a question with variables
B. a statement that can be tested to answer a question
200
Why are some volcanic eruptions more explosive than others? Why do some volcanoes produce more gasses and ashes than others? These questions and many more "why" questions help form the ________________. A. hypothesis B. conclusion C. data D. scientific method
A. hypothesis
200
When liquid water is cooled to make ice blocks, what type of change occurs? A. fluid change B. change of position C. change of state D. chemical change
C. change of state
200
A solution in which one of the substances is metal is a(n) _______________. A. mixture B. magnetism C. alloy D. rust
C. alloy
200
A push or pull, _____________, is measured in the metric unit, ______________. A. gravity, pounds B. force, newton C. weight, newton D. acceleration, speed
B. force, newton
300
This is a process or system that scientists use to answer questions. Its steps are not always followed in order every time. What is this process? A. directions B. observations C. scientific method D. questioning
C. scientific method
300
The ____________________ changes or is altered in an experiment. A. hypothesis B. independent variable C. conclusion D. question
B. independent variable
300
Objects weigh less on the Moon than on the Earth? Why? A. Their mass is less on the Moon than on Earth. B. The pull of gravity is not as strong on the Earth. C. The volume and density has changed from the Moon to the Earth. D. The pull of gravity is not as strong on the Moon.
D. The pull of gravity is not as strong on the Moon.
300
When a liquid changes into a gas, this describes ______________. A. condensation B. evaporation C. chemical change D. separation
B. evaporation
300
If a car is traveling north at 65 kilometers per hour, we know the car's _______________. If a truck is traveling 55 kilometers per hour, we know the truck's ___________. A. acceleration, speed B. speed, inertia C. velocity, acceleration D. velocity, speed
D. velocity, speed
400
If two or more types of matter are combined and keep their original chemical properties, you have a ________________, that is called a(n) ________________ . A. solution, physical change B. chemical change, mixture C. solution, chemical change D. physical change, mixture
D. physical change, mixture
400
A ________________ is a screen that holds back the larger particles of a mixture. This method of separating a mixture is called ______________. A. filter, settling B. magnet, magnetic attraction C. condenser, distillation D. filter, filtration
D. filter, filtration
400
When we describe an object's position, we compare it to surrounding objects. The objects used for comparing are called the__________________. A. location B. motion position C. variable D. frame of reference
D. frame of reference
400
_________________ is being measured when the unit of measurement is cm3, and __________________is being measured when the unit is cm2. A. Length, width B. Area, volume C. Volume, density D. Volume, area
D. Volume, area
400
Magnets are used to separate ______________, because they share the property called magnetic attraction. However filtration is used to separate ________________. A. soils; gas and liquids B. metals; solutions C. alloys; chemical properties D. metals; solids and liquids
D. metals; solids and liquids
500
Why would a 1 pound gold bar sink, while a 1,000 pound barge float? Explain.
Though the gold bar weighs less than the boat, it is solid and denser than the water. The barge is not solid and is less dense than the water. Therefore the barge floats and the gold bar sinks.
500
Velocity is another way to describe motion. What is needed to identify the velocity of an object? A. its distance and direction of motion B. its distance that the object has moved in an amount of time C. the direction of motion and the object's speed D. the force of motion and its distance
C. the direction of motion and the object's speed
500
When water is heated to a boil, it changes from a _________ to a __________. Then when steam, or water vapor, cools its state changes from a ____________ to a ___________. A. liquid, gas; gas, liquid B. gas, liquid; liquid, solid C. liquid, gas; liquid, gas D. gas, liquid; gas, liquid
A. liquid, gas; gas, liquid
500
Look at the data chart. What does the data show? Be specific in your explanation.
The width of the wings increases the length of flight. The wider the wings the longer the flight.
500
Metric Units Table What unit of measurement would most likely be used to measure find the area, length and width, of a classroom? Why?
The unit of measurement would be the meter. A kilometer is too big and would be okay for larger areas or distances, like for a map or road. A decimeter and centimeter are too small and would take a longer time. It would be more reasonable to use the meter.