Show:
Periodic Table
Chemical and Physical changes (formation of a new substance)
Kinetic vs Potential Energy. Balanced and Unbalanced forces. Changes in force and motion
Density and Mineral Properties
Energy Sources, Kingdoms, and Domains
100
What is the difference between an element and a compound? Give me an example of each.
An element is a pure substance that can not be broken down into a simpler substance. A compound is a substance made up of two or more elements that are chemically bonded together.
100
Bubbles and fizzing can be seen instantly when baking soda is mixed with vinegar. The bubbles are evidence of which of the following?
A chemical change...a gas is released when the baking soda and vinegar are mixed.
100
State the law of conservation of energy:
Energy is neither created nor destroyed, it only changes from one form to another.
100
Which of the following is the correct calculation for determining the density of an object with a mass of 54 g and a volume of 6 mL? A 6 ÷ 54 B 6 x 54 C 54 ÷ 6 D 6 + 54
C 54 / 6
100
One advantage of using biomass as a renewable energy source is that biomass – A is a less concentrated energy source, making it less efficient. B is a more expensive option when compared to other fossil fuels. C releases some harmful emissions into the atmosphere when burned. D decreases waste products from municipal and agricultural sources.
D decreases waste products from municipal and agricultural sources.
200
Where on the periodic table would metals, nonmetals, and metalloids be located?
Metals would be to the left of the staircase, metalloids on the staircase, and nonmetals to the right.
200
All of the following are evidence of a chemical change EXCEPT – A change in state of matter. B formation of a gas. C color change. D precipitate forms.
A. Change in state of matter.
200
What is the difference between kinetic and potential energy? Give examples of both.
Kinetic energy is energy of motion. Potential energy is stored energy.
200
A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose to 35mL. Calculate the density of the rock in g/mL.
The density of the rock is 14g/mL
200
The advantage of burning coal in order to generate electricity is that coal is – A an inexpensive source of energy. B the least energy efficient fossil fuel. C a non-polluting source of energy. D a renewable energy source.
A an inexpensive source of energy.
300
What two elements are most abundantly found in the Earth's crust? What about the Earth's atmosphere?
Crust- Silicon and Oxygen Atmosphere- Nitrogen and oxygen
300
A student mixes two clear liquids together. After a few minutes, a white powder can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids – A have combined to produce a new substance. B were pure substances before they were mixed. C are toxic and should be handled with extreme caution. D have been stored too long and are no longer good.
A. have combinded to produce a new substance.
300
Explain the difference between a balanced and unbalanced force.
Balanced forces will not cause a change...what does that mean? Balanced forces will not cause a change in the motion of a moving object or cause a nonmoving object to start moving. Unbalanced forces WILL produce a change in the objects motion. This could be a change in speed...direction or even both.
300
Physical properties of minerals such as color, hardness, luster, and streak are used to determine what about a mineral? A Identity B Mass C Age D Location
The identity
300
Which of the following characteristics can be used to classify an organism into a taxonomic domain? A Being unicellular or multicellular B Mode of reproduction C Presence of nucleus in cells D Being heterotrophic or autotrophic
C Presence of nucleus in cells
400
Conductivity is a physical property of metals that describes its ability to-
Easily transfer thermal and electrical energy.
400
What is NEVER created or destroyed in a chemcial reaction (change)?
matter.
400
Please draw the following DISTANCE VS TIME motion graphs: Constant speed, no motion, accelerating, and decelerating
Look at white boards
400
Scientists test for the hardness of a mineral by doing which of the following? A Measuring the mass of the mineral and comparing it against other minerals B Observing how light reflects off the mineral and how the mineral looks as a result C Observing the color of a mineral and comparing it against other minerals D Scratching the mineral against other substances of known hardness
D. Scratching the mineral against other substances of known hardness.
400
Organisms that are members of the family Coccinellidae are heterotrophic, reproduce sexually, and are multicellular. Knowing this, we can be certain they belong to which Kingdom? A Animalia B. Plantae C Eubacteria D Protista
Plantae
500
The smallest particle of any particular type of matter is known by what term?
An atom
500
How is a physical change different from a chemical change? What are properties of both?
A physical change is when matter changes size, shape, or form. A chemical change is when the substances that make up an object have been changed into other changes. Chemical changes: produces a new substance, a new color appears, heat, light, or sound, bubbles of gas are formed, a solid material (precipitate) is formed, the change is impossible or difficult to reverse. Physical change: size, shape, or state of matter (solid, liquid, gas) has changed.
500
We are having a science class tug of war constest. Mrs. Frizzle's class will go against Bill Nye's class. Mrs Frizzles class is pulling with 100N ...while Mr. Nye's class is pulling with 99N. WHO WILL WIN?? WHY??
Mrs. Frizzle's they are pulling with more force.
500
One test of a mineral is the streak test in which what property is determined? A The color of powder left behind when the mineral is rubbed on a surface B The amount of pore space in the mineral as measured by submerging it in water C The conductivity of a mineral, determined by attaching it to an electric circuit D The wavelength of light that is refracted when light passes through the mineral
A. the color of powder left behind when the mineral is rubbed on a surface
500
Which of the following Kingdoms includes organisms that are single-celled eukaryotes that can be either heterotrophic or autotrophic? A Plantae B Fungi C Protista D Animalia
Protista