Vocabulary
A ____________ is when all substances are evenly mixed, like lemonade.
Solution
A ___________ is a physical adaptation to a body part
Physical Adaptation
Engineers use a ____________ to represent something bigger or smaller than the original
Model
Scientists use different models depending on the subject they are studying. What is true about all models?
a. Models are made by humans
b. Models represent one object at a time
c. Models are the same size as the objects they represent
d. Models include every detail of the objects they represent
a. Models are made by humans
Where would an animal with thick white fur and a thick layer of fat most likely live?
a. in the desert
b. in a stream
c. in a grassland
d. in a polar region
d. in a polar region
___________________ are replaced quickly like sunlight and wind
Renewable Resources
Two or more substances that keep their identities like salad is called a ___________
mixture
We built a ________________in class that creates magnetism
Electromagnet
A company has just built a prototype of a camera. What should the company do next?
a. Test the prototype
b. Compare the results of the tests
c. Produce a large number of cameras
d. Determine features they want the camera to have
a. Test the prototype
Most automobiles are fueled by gasoline. Which nonrenewable resource is used to make gasoline?
a. coal
b. limestone
c. oil
d. rock
c. oil
mass
Physical change
The second object or place is called a ________________.
Reference point
Michael and Pablo have designed a parachute that is intended to slow the fall of a toy rocket. They have made sketches of their design. What should they do next?
a. test the model
b. construct the model parachute
c. evaluate the design for revision
d. collect and analyze the test results
b. construct the model parachute
Jody observed the sky one morning and saw it was filled with stratus clouds. Which of the following is the BEST prediction of the water for the day?
a. light rain all day
b. low chance of rain
c. heavy rain and hail
d. strong thunderstorms
a. light rain all day
An explanation that is based on evidence is called a
conclusion
_________ is a change in position
Motion
Kim places a cup of water and a cup of cooking oil in the freezer. Every 30 minutes, Kim checks the cups. She records the time when the liquid in each cup freezes. Which question is Kim investigating?
a. Which liquid freezes faster, water or cooking oil?
b. Which liquid tastes better frozen, water or cooking oil?
c. Which item floats better, frozen water or frozen cooking oil?
d. Which item melts faster, frozen water or frozen cooking oil?
a. Which liquid freezes faster, water or cooking oil?
Water is an important natural resource. Fresh water is used for homes and businesses. Salt water is used for recreation and fishing. What type of natural resource is water?
a. human resource
b. mineral resource
c. renewable resource
d. nonrenewable resource
c. renewable resource
Nina plats catcher on her softball team . She wants to design a mitt that will better absorb the force of the ball. She and her teammate Sasha are just beginning the design process. What should they do first?
a. build a prototype
b. test their prototype
c. keep careful records
d. brainstorm possible solutions
d. brainstorm possible solutions
Materials that are found in nature that living things use is called
Natural Resources
The location of an object in relation to a nearby object or place is its _________
Position
Lin built a prototype for a new race car. During testing, the car would only move a short distance before coming to a sudden stop. What should Lin do next?
a. Build and test a new toy care
b. Build a paper plane instead
c. Use her observations to redesign the car
d. Redesign the race car's track and make it shorter
c. Use her observations to redesign the car
Daniel's science class has to choose an example of potential energy changing into kinetic energy. Which could they pick?
a. sun warming a green house
b. pieces of iron stick to a magnet
c. battery in a drawer
d. toy car rolling down a ramp
d. toy car rolling down a ramp
Cars, bicycles, animals, and people are all objects that can be in motion. Which statement about motion is correct?
a. an object in motion is accelerating.
b. motion is the change in position of an object
c. gravity and friction are responsible for all motion
d. an object in motion has no speed, but it does have velocity
b. motion is the change in position of an object.