Atoms
Chemical Reactions
Motion and Forces
Waves
Potpourri
100

The core of an atom is called this. 

The nucleus 

100

the terms for the beginning  and ending materials in chemical reaction. 

reactant and product 

100

To find velocity what two things do you need to know?

Speed and Direction 

100

These waves travel perpendicular to the direction of the wave, creating crests and troughs. 

Transverse Waves

100

How compact an object is, equal to mass/volume.

Density 

200

These are the two particles located in the nucleus of an atom. 

proton and neutron

200

        Balance the following equation


 ___ N2+  ____ H2 → ____ NH3

           N2 +  3H2 → 2NH3

200

This is the metric unit used to measure force. 

Newton

200

These are the lowest frequency waves on the electromagnetic spectrum.

Radio

200

This variable stays the same in an experiment

Controlled 

300

This is the outer shell of an atom that determines if it will bond or not with other atoms. 

Valence Shell 

300
This is the only element in group 18 that has a full valence shell with 2 electrons 

Heilium 

300

What is newton's second law of motion?

F = M x A

300

What does the law of reflection state. 

Incoming light reflects at same angle as reflected light 

300
This scientist organized the first periodic table of elements. 

Mendeleev

400

This is an odorous yellow brittle non metal located in group 16 of the periodic table. 

What is sulfur. 

400

What are 4 evidences that might show a chemical reaction has occured 

new color is produced

change in temperature

precipitate forms

gas production 

odor produced 

400

According to the laws of universal gravitation what two factors affect the force of gravity bewtween two objects?

Their masses and the distance between them. 

400

What type of lens corrects vision for someone who is nearsighted?

Concave.  - spreads out light to reach the retina 

400

The first Earth Day was celebrated in this year... A: 1950 B: 1960 C: 1970 D: 1980

1970

500

These two atoms make up table salt. 

Na Cl 

500

When the number of atoms are equal on both sides of the equation, this law has been fulfilled.

Law of Conservation of Mass / Matter

500

 Explain the action and reaction forces acting on a book resting on a table

book pushes on table table pushes back equal and opposite 

500

Why does light have a "dual nature?"

it can behave as waves or particles

500

What is the chemical formula for photosynthesis?

6CO2 + 6H2O → C6H12O6 + 6O2