chem basics
This is the smallest unit of matter that keeps the properties of an element.
An atom
The unit used to measure electrical current.
ampere
Organisms that make their own food using sunlight are called these.
producers
true or false the color of the hottest star is red
FALSE ( its blue)
A coin has a mass of 12g and a volume of 2cm^3 what is the density?
D=m/v
D = 12 divided by 2
D = 6g/cm^3
This particle has a positive charge.
this is a proton
This force opposes motion between two surfaces touching.
friction
This term describes all the living and non-living things interacting in an area.
ecosystem
Space exploration name a positive n a negative
positive: gaining knowledge, technology
negative:expensive, dangerous, space debris
In a series circuit is the voltage or current the same?
Current ( think of it like this in a series voltage is shared/different and current is the same)
Elements in the same column of the periodic table have the same number of these.
this is a valence electron!
this circuit has multiple pathways.
parallel
primary succession happens when...?
1. when soil is already on land
2. bare rock (no soil)
2. bare rock (no soil)
the options below u are scrambled order them from smallest to biggest of space.
1. stars
2. planets
3 universe
4. galazy
correct order: planet, stars,glaxy,universe
True or false the atomic mass is at the top of the element in the periodic table?
FALSE the mass number is BELOW the element the top number is it's ATOMIC number
This is the total number of protons and neutrons in an atom.
mass number
grounding is...?
grounding excess charges into the earth
True or false and omnivore is an organism that eats both plants and animals
TRUE
below u are scrambled order of the planets order them corrctly.
1. saturn
2. uranus
3. jupiter
4. mars
5.earth
6. neptune
7. venus
8. mercury
correct order- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
how do you calculate for neutrons?
(hint: ? - ? = neutrons)
Mass number - atomic number = neutrons
When a solid forms from two solutions during a chemical reaction, this product is called this.
this is precipitation
1. like charges ____
2. opposite charges ______
1. repel
2. attract
name the 4 human impacts on ecosystem
1. habitat loss & fragmentation
2. invasive species
3. pollution
3. climate change
4 pesticide use
Gas giants...?
Jupiter,saturn,uranus,neptune
when the earth blocks sun's light it is what type of eclipse?
LUNAR ECLIPSE!!