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Worksheets6th HMH Unit 1 L 1 & 2
Total questions: 20
Worksheet time: 10mins
Which statement best describes science?
a collection of knowledge about Earth
a list of facts that all scientists agree are true
a study of natural events and conditions
a complete explanation of everything that happens in the universe
Chung is a scientist who invented a new material that absorbs water in a cup so that the water does not drip when the cup is turned upside down. She thought that the material might be good for cleaning up spills at home. Which of the following will help Chung the most in her investigation to see if the material will be good for this task?
Test the material with different amounts of water.
Give samples of the material to other scientists.
Find the most efficient way to make a lot of the material.
Use the latest scientific equipment for all experimenting.
Which of the following is always considered part of a scientific investigation?
a science laboratory
graphs or charts of data
a written report that shows the data
observations about the natural world
During a sunny afternoon, the sun suddenly seems much less bright than usual. The daylight seems much less intense, as if there is a dense cloud cover, but there are no clouds in the sky. After about a half hour, everything seems normal again. Which claim about the temporary decrease in light can be supported by the evidence?
The moon was passing between the sun and Earth.
An airplane was flying overhead and blocked the light from the sun.
There are variations in the amount of light produced by the sun.
A sudden change in temperature increased the density of the atmosphere.
A scientist found that a Petri dish from an experiment had not been cleaned several days earlier. In the dish, she discovered a bacterial culture that she had not seen during the experiment. How could she gather evidence to support a claim about whether the bacteria had developed from the material left from the earlier experiment?
Take a sample of the bacteria and grow it in an incubator.
Gather dirty Petri dishes from other labs to see if they grow the same bacteria.
Check all the clean Petri dishes for residue from the previous experiment.
Try the original experiment again, do not clean some of the Petri dishes, and see if the bacteria grow.
Medical students use a three-dimensional reproduction of a human skeleton to learn about bones. Which item describes this learning tool?
an x-ray model
a physical model
a computer model
a mathematical model
One of Newton’s laws of motion states that objects in motion tend to stay in motion. What reasoning supports the claim that this law may not always prove true for objects on Earth?
The law is a mislabeled theory.
Laws cannot be used to make predictions.
The law is not supported by scientific observations or evidence.
The conditions on Earth are different than the conditions specified in the law.
Bo learns about the law of inertia. It states that objects at rest tend to stay at rest and objects in motion tend to stay in motion. The state of motion changes only when another force acts on an object. Bo wants to use this law to make a claim about how a soccer ball will roll on the grass after he kicks it. Which claim is supported by the evidence and reasoning?
The ball will keep rolling until the forces between the ball and the grass makes it stop.
The ball will not move because it is at rest when he kicks it.
The ball will have little movement after he kicks it because it wants to stay at rest.
The ball will keep rolling forever after he kicks it.
The table shows data on how the population of butterflies in a backyard changes over five days.
Which mathematical model predicts how many butterflies there will be on Day 6?
Number of butterflies = 3 + 3
Number of butterflies = 3 x 3
Number of butterflies = 15 + 3
Number of butterflies = 15 x 3
Scientists need to know how gravity acts on a space shuttle so they can put the space shuttle into orbit. They use an equation that describes how gravity relates to the mass of two objects and the distance between the two objects. Which term describes this equation?
a model
an observation
a scientific law
a scientific theory
systematic study of natural events and conditions. A logical structured way of thinking about the world.
science
empirical evidence
theory
model
observations, measurements, and other types of data that people gather and test to support and evaluate scientific explanations.
science
empirical evidence
theory
model
a well-supported explanation about the natural world. ___ explain the observations scientists have made.
law
empirical evidence
theory
model
____ is a representation of something in the natural world. ____ allow scientists to study things that are too large or too small.
law
empirical evidence
theory
model
___ describes a basic principle of nature that always occurs under certain conditions. For example: an object in motion will stay in motion unless acted upon.
law
empirical evidence
theory
model
Good theories change with "new observations" made by scientists.
true
false
A "law" can be a statement or a mathematical equation.
true
false
"Measurement" is always part of a scientific investigation.
true
false
Questions need to have "testable" answers. The results can be measured and compared.
true
false
The study of all living things, from the smallest, one-celled organisms to mammals.
life science
earth science
physical science
