Atoms
Atoms are made up of three particles: protons, neutrons and...
Neutrons
Water boiling is an example of what kind of change?
Physical Change
What is the smallest unit of a living organism?
Cell
The Earth orbits the Sun because of what?
Gravity
Unit of of measurement used to identify the distance from the Sun to Saturn
Astronomical Unit (AU)
The nucleus of the atom is made up of what?
Protons and Neutrons
Fruit rotting in the pantry is an example of what kind of change?
Chemical change
What body system sends and receives messages?
Nervous System
What causes seasonal changes on earth?
Tilt and rotation
How do scientists classify stars?
Size indicates brightness
Color determines temperature
Anything that has mass and takes up space is referred to as...
Matter
When a substance in a closed system changes from a liquid to a gas, which of the following describes the mass of the changed substance?
The mass does not change
Which body system is responsible for the production of red blood cells
Skeletal
How often does earth experience a high tide in a full 24 hours?
Twice a day
Which of the following solar properties is the result of strong magnetic fields, that lower the temperature relative to its surroundings?
Sunspots
What is the number of electrons found in the Element of Nitrogen.
Atomic #- 7
Atomic Mass- 14
Number of electrons - 7
If the temperature of a hot plate was changed from 30°C to 35°C during a chemical change, what would occur?
The chemical change would speed up.
What is the main organ of the circulatory system?
The heart
During what moon phases does a spring tide occur?
New moon and full moon
The moon’s gravity is about 1⁄6 of the Earth’s gravity. If a person was to travel to the moon, how would their mass and weight be affected?
Mass would remain the same and their weight would decrease.
What is the number of neutrons found in Gold (Au)
Atomic #- 79
Atomic Mass- 197
Neutrons - 118
James fills a graduated cylinder with 50 mL of water. He then drops a 60g key into the graduated cylinder to measure the volume of the key. The water level inside the graduated cylinder rose to 53 mL as shown below.
If Density = Mass / Volume, what is the density of the key?
20 g/mL
The main function of the circulatory system is
Transport blood, nutrients, and gases throughout the body
Term for when the moon is getting larger.
Think of the moon phases
Waxing
The planet Mercury has a revolution period of 88 days. Why does Earth have a longer revolution period?
The earth is farther away from the sun
Mercury is closer to then sun