Show:
What is science?
Matter
Atoms & The Periodic Table
Nuclear Changes
Electricity & Magnetism
100

Most scientific questions are developed from...

observations

100

A substance that cannot be broken down into simpler substances is...

an element.

100

The charge of an atom is...

0

100
True or False: When a radioactive element decays it can transform into either a different isotope of the same element or an entirely different element.
True
100
Potential difference is measured in...
volts.
200

What SI unit is used to measure the height of a bookcase?

meters

200

The notion that an object floats if the buoyant force on the object is equal to the objects weights was described by... 

Archimedes

200
According to Bohr's model of the atom, electrons behave like...
planets orbiting the sun.
200
Are alpha particles positively or negatively charged?
Positively charged
200
True or False: Electric field lines point toward a negative charge and never cross each other.
True
300

What type of graph is best for showing changes in data over time?

Line graph

300

The physical or chemical properties that are typically used to describe a substance are called...

characteristic properties

300

Atoms of elements belonging to the same group have the same number of...

valence electrons

300
Nuclear radiation refers to energy emitted from an unstable...
nucleus.
300
The resistance of an insulator is... (high or low)
high.
400

Rewrite 5,800,000,000cm in scientific notation.

5.8 x 109

400

Temperature measures the average __________ energy of the particles in an object.

kinetic

400

Group 18 noble gases are inert (non-reactive) because...

their outermost energy level is full.

400
The opposite reaction to fusion is called...
fission.
400
How can the magnetism of a piece of iron be weakened?
Heating and hammering the iron.
500

Convert 1362 g into kilograms. 

1.362 kg

500

The two laws of conservation state that ________ and _______ cannot be destroyed.

mass and energy

500
In which type of bond do atoms share electrons?
Covalent bonds
500
Smoke detectors contain small radioactive sources. Do these sources release alpha, beta, or gamma particles?
Alpha particles
500
Light travels as...
electromagnetic waves.