Mostly Chemistry 1
Give an example of a chemical reaction
Random Answers that may include: Burning stuff, changing the molecules permanently
A student wanted to look at pond water to see what organisms they could find. Which of the following tools would the student use?
a. balance b. graduate cylinder
c. microscope d. magnifying glass
c. microscope
What is the unit for force?
Newtons (N)
Why are fossil fuels considered “nonrenewable”?
a) they are easy to make
b) they are cheap
c) they take millions of years to create
d) they are replaced as they are used
c) they take millions of years to create
A person jumps out of an airplane and does not deploy his/her parachute. Which type of energy is increasing as he/she falls towards the ground?
kinetic is increasing and potential is decreasing
Purpose of the Immune system
To defend against bacteria, viruses, and pathogens
What occurs at the boiling point of a substance?
a. a substance changes from a gas to a solid
b. a substance changes from a liquid to a solid
c. a substance changes from a solid to a liquid
d. a substance changes from a liquid to a gas
d . a substance changes from a liquid from a gas
Which of the following removes carbon dioxide from the atmosphere:
a) fossil fuels b) greenhouse gases
c) plants d) dead organisms
c) plants
State the Law of Conservation of Mass
Energy can neither be created or destroyed only transferred
What is the formula for speed?
distance/time
grass.... mice....snake...hawk...
What would happen if the mice were removed from the food chain
a. The grass would increase and the hawk would decrease
b. The snakes would increase and the hawks would decrease
c. The grass would increase and the snakes would decrease
d. The Hawks would increase and the grass would decrease
c) grass would increase and the snakes decrease
How many hydrogen atoms are in 4 molecules of NH4?
16
What does ATP stand for?
Adenosine Triphosphate
What is the most common element in the human body?
Oxygen is the most common element in the human body, making up almost 63% of the average human, followed by carbon (19.37%), hydrogen (9.31%), and nitrogen (5.14%).
Daily DOUBLE: Which would be an example of chemical potential energy:
a. a spring compressed
b. a ball rolling down a hill
c. a child sitting at the top of a slide
d. powder on the tip of a match
d. powder on the tip of a match
Where do all living things on the earth originally get their energy from?
The sun
What type of energy is food?
chemical potential energy
What is evaporation?
a . gas turns to liquid
b. solid turns to liquid
c. liquid turns to gas
d. water turns to ice
c. liquid turns to gas
Two rock samples are placed in water. Sample A floats, but sample b sinks to the bottom.
Which statement describes explains why this occurs?
a. sample b has more mass
b. sample a has less volume
c. sample b has a greater density
d. sample a has a higher freezing point.
c. sample b has a greater density
Frank has a beaker with a mixture of salt and water. He would like to recover the salt from the water. Which would be the best method to accomplish this?
a. evaporation b. reflection
c. freezing d. refraction
a. evaporation
Unlike most other fish, sharks have no?
Unlike most other fish, a shark has no bones! Its skeleton is made of cartilage, a material somewhat softer and more flexible than
List the equation for Newton's second law
Force=mass x acceleration
The gases that trap heat in the earth's atmosphere are called
What is greenhouse gases?
Tommy placed a black, white, silver, and blue can under a heat lamp with a thermometer in each one. Which one of the cans will be the coolest?
a. black, because it absorbs the heat
b. blue, because it wasn't under direct light
c. white because it would reflect light
d. silver, because it is shiny
c. white, because it would reflect light
Frozen orange juice is place in a bowl. After a few minutes it begins to melt. What type of change has occurred?
a. chemical
b. melting
c. physical
d. mixture
c. physical
Using a periodic table to find this answer...
How many neutrons are in an atom of carbon? Explain how you found your answer.
atomic number-atomic mass= 6
What is the total number of atoms in this molecule?
C6H22O6
34
Which color of light is the WORST for shining on plants so they can do photosynthesis?
GREEN! Because plants reflect green light, that's why we see them as green. If they reflect green, they are not using that light as energy.
Daily DOUBLE: What can you do to get a Mylar balloon to float again once it has deflated?
Heat it up to increase the volume and decrease the density
Which of these is NOT a greenhouse gas?
water vapor
carbon dioxide
methane
oxygen
oxygen
What is the difference between velocity and speed?
velocity has a direction
Which has more energy: a 50 kg rock or a 100 kg rock?
100 kg rock because more mass=more energy!
You push into a well with 30 Newtons of force, it pushes back with?
30 Newtons
Through which phase of matter does sound travel fastest?
Solid
What is the process by which dry ice transforms from a solid to a gas without going through the liquid phase?
sublimation