What part of the Earth is affected when global warming causes glaciers to change?
100
What is sublimation?
What phase change occurs when dry ice changes into carbon dioxide?
100
What is the angle of Earth's hemispheres in relation to the sun?
What causes the seasons on Earth?
200
What is roasting the marshmallows?
On a camping trip, Rachel and Samuel make s'mores. She assembles the different ingredients to make the s'more. She melts the chocolate. Last, she roasts the marshmallows over the fire. Which action represents a chemical change?
200
What are tissues?
In humans, smooth muscle is an example of what level of organization?
200
What is electrical force? (opposite charges attract)
Janet rubs a balloon on her hair and then held the balloon over her head. what force caused her hair to stand up?
200
What is the law of conservation of energy?
What law states that energy is transformed from 1 form to another?
200
What is age or temperature or size?
Stars seem to be made up of similar chemical elements (hydrogen and helium). Which characteristic is used to differentiate among stars?
300
What is firewood?
Out of the following (firewood, diamonds or compounds) - which one is made of cells?
300
what are the respiratory and circulatory systems?
What body stems function together to distribute oxygen for use in cellular processes throughout the body?
300
What is a rocky surface?
What property does Earth and Mars have in common?
300
What is a force that opposes motion?
What is friction?
300
What is asexual reproduction?
During this kind of reproduction, offspring receive DNA from 1 parent rather than 2.
400
What is a chemical change or combustion?
What kind of change is observed when carbon changes into a gas and reenters the atmosphere?
400
What is natural selection?
Scientists have found evidence in the fossil record that the structure of certain animals has changed over time. What is the best explanation of why animal populations adapted over time?
400
What is convection?
Which heat transfer occurs when warm air rises and displaces cooler air?
400
What is the star's temperature?
What does a decrease in a star's absolute brightness change?
400
What is a plant cell?
A scientist thinks he has discovered a new virus the degrades cellulose, a major component in cell walls. Which type of cell would be affected by this virus?
500
What is a partial lunar eclipse?
When the Sun, Earth, and the Moon are all aligned, and only part of the Moon falls in Earths shadow, what appears?
500
What is erosion?
Human actions can cause significant changes to the planet's surface. Vegetation has been cleared by humans. If there are heavy rains in that area, what process is most likely to increase?
500
What are the nervous and digestive systems?
Which 2 systems are involved in neurons in the brain stimulating smooth muscles in the intestines to move food through the body?
500
What is parasitism?
What kind of relationship is shown when a tapeworm lives in a sheep's digestive tract and get nutrients from its blood?
500
What are chemical and mechanical energy?
Selena ate a sub sandwich and a cookie for lunch. Later that day, she ran 2 miles during volleyball practice. What 2 energy transformation occurred between lunchtime and the end of her practice?