Nature of Science
Percent of Energy used in 2015: Biofuel 14%, Coal 17%, Natural Gas 32%, Petroleum 25%, Solar Power 12%
Based on this evidence, which percentage of energy used in 2015 came from renewable resources?
26%
Planets are classified as either inner planets or outer planets. What is found between the inner planets and the outer planets?
asteroids or asteroid belt
Jacob put yeast into a bowl of water and added a little sugar. He put the bowl in a warm place. After a while, Jacob observed foam spilling out of the bowl. What kind of change is occuring?
Chemical change
Vaccines are used prevent illness. Most vaccines are given as injections or shots. Before a doctor gives a patient a shot, the doctor wipes the skin with rubbing alcohol. What is the main reason for wiping off the skin?
To prevent infection
What part of the water cycle does water turn into gas?
Evaporation
Several students took part in a bird census for the month of October. Each student wrote a report to summarize their findings. Which has the most accurate empirical observation from their census?
Jake: There were plenty of birds flying north on Saturday.
June: I counted 42 tree swallows and 112 blue jays in three hours.
Eric: Most of the birds I saw were ducks and flamingos.
June
Which planet in the solar system most likely has a mass more than 300 times greater than the mass of Earth?
Jupiter
Name an example of a physical change.
What object performs a function similar to that of the human body's skin?
camera lens, astronaut suit, house frame, telephone wire
astronaut suit
Some materials conduct electricity, but some do not. Name a material that is a good conductor.
Copper wire
Several students took part in a bird census for the month of October. Each student wrote a report to summparize their findings. Which has the most accurate empirical observation from their census?
Jake: There were plenty of birds flying north on Saturday.Carla: I saw three types of birds I could not recognize.
Jun: I counted 42 tree swallows and 112 purple martins in three hours.
Esteban: Most of the birds I saw, like ducks and flamingos, live in Florida all year long.
Jun: I counted 42 tree swallows and 112 purple martins in three hours.
There are four types of galaxies. Name them.
Elliptical, irregular, spiral, barred spiral
Name an example of a chemical change.
car rusting, cake baking, etc.
Ears are used to help us hear. Which specialized cells are found in ears?
Hair cells
What does a spring scale measure?
Force
In science, we often gather information with our senses by watching, listening, smelling, and touching. For example, you may record how the color of a flower changes. What is this process called?
Making observations
What type of galaxy is Earth a part of?
Barred spiral galaxy
What has the greatest effect on how quickly a substance changes from one state to another?
Temperature
Which human organ absorbs nutrients?
Small intestines
What force causes a ball to start rolling down a hill?
Gravity
Scientists always develop a plan when they try to learn something about our natural world. What is the sequence they use?
(put them in order) develop an idea, suggest an explanation, make observations, obtain evidence
Make observations, develop an idea, obtain evidence, suggest an explanation
What type of star in our sun?
Medium, yellow star
What are some things you can do to increase the dissolving rate of sugar in water?
Increase temperature, increase speed of stirring
Which organs are part of the female reproductive system?
Ovaries
What is a feature of a deciduous tree?
The have leaves that change color and fall.
Kyle is wondering what he is getting for his birthday. He decides to shake the box that contains his present. What was the first step Kyle took in this situation that a scientist also takes?
Asking a question
Which planet is known for its Great Dark Spot?
Neptune
Different elements have different kids of atoms. How can you tell an atom of one element from an atom of another?
the number of protons
Which organ of the digestive system mashes food and mixes it with acid?
Stomach
What is an adaptation on a rose that helps protect it from animals eating it?
Sharp thorns
Scientists communicate their results by publishing their work. What reasoning explains why this is important?
To learn from each other
Which weather instrument measures humidity?
Hygrometer
What are the charges on balloons that are repelling each other?
They have the same charge
Which organism excretes uric acid along with digestive wastes as a thick, white waste product?
bird
Arabian camels have a single hump on their back that stores fat. The rest of the camel's body has no fat. What claim tells how this helps the camel survive in the desert?
It helps them stay cooler
Each measuring tool is designed to measure a specific property of an object or material. Which of these tools can be used to measure the volume of a material?
spring scale, measuring cup, balance, or thermometer
Which weather tool measures air pressure?
Barometer
Light energy
When a new species from another area is introduced to native plants and take over the area, they are known as what?
Invasive species
When a pelican gets hot, it opens its bill and flutters the sides of its pouch. This causes water to evaporate, which cools the pelican. What type of adaptation is the movement of the pelican's pouch?
Behavioral adaptation
What is the metric unit for measuring mass?
kilogram or gram
What type of weather is typical for a high pressure system?
What energy transformation occurs when a fan is plugged into a wall?
Electrical energy into energy of motion
Flamingos have serval unusual features. What feature os a flamingo helps them to survive in marshes?
They have glands that help them excrete excess salt
Why do otters have streamline bodies?
Scientist usually write reports about their investigations. What reasoning explains why they do this?
To communicate their work to other scientists
What type of weather do you expect during a low pressure system?
Rainy, stormy weather
What type of energy does a book sitting on a shelf have?
Potential energy
Based on the beak of the hummingbird, which is long and pointy, what does it most likely eat?
Nectar
The blood transports oxygen, nutrients, and wastes throughout the body. It also fights infection by attacking germs. What part of blood fights infection?
White blood cells