Chemistry
Physical change
is a change that can be reversed. things like melting ice and boiling water
what is the largest planet
Jupiter
what is a abiotic and biotic factors
Abiotic is non-living.
Biotic is living
Define electric current
An electrical current is the movement of electrons within the circuit.
Chemical change
are unreversible. things like smell and temperature
how many planets are there and list them in order
8 planets
mercury, Venus, earth, mars, Jupiter, Saturn, Uranus, Neptune
What is photosynthesis
what is cellular respiration
plants use Carbon dioxide and water and turn it into oxygen and glucose
another form of living organisms to get energy. Glucose + oxygen= carbon dioxide, water and energy
How is resistance affected by the type of material and the length or thickness of a wire?
The length of a cable increases the resistance. This is because the electrons collide with the atoms in the materials. The wider cables have more space for electrons to move. Which has less collisions
homogenous mixture
the same substance
What is the orbital period of earth
365 days
Two forms of succession
Primary and secondary
Primary succession is when a new land is formed or bare land is exposed. Creating room for a new habitat
Secondary succession is when a previously occupied area that has been affected by a disturbance that killed most or all of its community develops into a new habitat.
Explain the science behind why hair sticks up after removing a winter hat
The hat starts negatively charged and the hair is positively charged. When removed the electrons automatically shift from the hat to hair to balance.
heterogeneous mixture
different substances make up one substance
what is a solar and Lunar eclipse
the moon moves into the line of earth and the sun allowing minimum light to pass to earth
Lunar eclipse is when the earth blocks the moon from any sun light making the moon look red
what are the 3 cycles
Water moves through the atmosphere, land and oceans
Nitrogen cycle
How nitrogen moves through living and nonliving things
Carbon cycle
Carbon enter living tissue and gets returned to the atmosphere
Explain the difference between conductors and insulators. Provide examples of each.
An electrical conductor allows electricity to flow through. Insulators completely stop any electrical flow. Example of conductor and insulator
conductor : Copper, iron, silver and water
Insulator: rubber band, eraser, plastic water bottle
—--- is a ball of frozen gas and dust that orbits the sun
Comet