viruses,Bactria, fungi & parasites
True or False: All bacteria are harmful to humans.
False
True or False: Wind energy is created by moving air.
True
True or False: ripping up paper is a chemical change
False
True or False: water quality is good for your heath
True
What is a virus?
A. A single-celled organism that lives on its own
B. A tiny infectious agent that needs a host cell to reproduce
C. A type of fungus that grows on food
D. A harmless particle in the air
B. A tiny infectious agent that needs a host cell to reproduce
What is energy?
A. The ability to do work or cause change
B. A type of solid matter
C. Something only found in living things
D. A kind of force that cannot move
A. The ability to do work or cause change
you can tell a chemical change is accruing when ____.
A. It changes colors
B. It looses mass
C. It multiplies
D. It stays the same
A. It changes colors
What does a parasite do?
A. Helps the host stay healthy
B. Lives independently without a host
C. Lives on or in a host and harms it
D. Produces its own food using sunlight
C. Lives on or in a host and harms it
Which of the following is a renewable energy source?
A. Coal
B. Oil
C. Natural gas
D. Solar energy
D. Solar energy
maria mixes 2 grams of baking soda and 8 grams of vinegar, and it starts to cause a chemical reaction. how many grams total is left after the chemical reaction?
A. 8
B. 10
C. 4
D.6
B. 10
Where do fungi grow best?
A. Cold and dry places
B. Bright sunlight only
C. Warm and moist environments
D. Inside metal objects
C. Warm and moist environments
What type of energy is stored in food and fuels?
A. Kinetic energy
B. Chemical energy
C. Thermal energy
D. Sound energy
B. Chemical energy
sally mixes two mystery substances together. soon the substances start to bubble and smell funny. what can you infer happened.
a.it was a chemical change because it made gas
b.it was a physical change because it made gas
c.it was a chemical change because it changed looks
d.it didn't go through any change
a.it was a chemical change because it made gas
Which of the following is caused by bacteria?
A. COVID-19
B. Malaria
C. Tuberculosis
D. Athlete's foot
C. Tuberculosis
What happens to non-renewable energy when it is used?
A. It disappears into the air
B. It is destroyed
C. It is turned into greenhouse gas
D. It stays exactly the same
C. It is turned into greenhouse gas
what is the difference from a physical and chemical change?
physical changes keep the the same property chemical changes,change their property's