Atoms and Molecules
What is the periodic table of elements?
a big chart that lists all the elements that have been discovered so far
What is lava made of?
molten rock
What is a solar eclipse?
A solar eclipse is when the moon cover the sun.
How is a solid different from a gas?
in solids, molecules are packed closely together while in gases the molecules are spread far apart.
What is trait variation? Give an example.
Trait variation is when organisms in a population have differences in the traits they have. For example, the giraffes have long necks, but not all their necks are the same length.
Where are atoms found?
everywhere
What is the difference between convergent and divergent boundaries?
Convergent move towards each other, divergeny move apart from each other.
What is a lunar eclipse?
A lunar eclipse is when the moon moves into the Earth's shadow
How is ice melting different than burning something?
When ice melts, the solid turns to a liquid. When burning something, the energy causes the old substance to change into a new substance.
What is natural selection?
The process by which some living things survive better in an environment and are able to reproduce and pass on their genes.
What are the three particles that make up an atom?
Proton, Neutron, Electron
What is Pangea
a super continent where all continents were together.
what is the difference between earth's orbit and rotation?
Earth orbits the sun once per year and rotates on its axis once every day.
Name three different properties you can test before and after a chemical reaction to determine if a new substance was formed.
Magnetism, flammability, electricity, density, and odor
What is artificial selection?
a process in which humans choose what traits they want other organisms to have.
A molecule is....
Two or more atoms bonded together.
What are earth's three layers called?
The crust is the top, next is mantle, last is the core.
If the sun is so much bigger than the moon, why do they appear to be the same size?
The moon is about 400 times smaller, but its about 400 times closer to the earth.
What does a catalyst do in a chemical reaction?
A catalyst helps the chemical reaction happen faster, but it does not become a part of the new substance.
How can the environment affect an organism’s traits? Give an example.
A change in the environment can affect an animal’s ability to hide from a predator. For example, we saw that when the environment changed, the hawk ate the light-colored pocket mouse instead of the dark one because the light one was easier to see.
What type of career would someone have if they were interested in atoms and molecules?
a chemist or anyone wanting to develop new types of medication
What career would someone interested in tectonic plates have?
seismologist, volcanologist
What type of career would someone have if they were interested in Solar/ lunar eclipses?
Astronomers
What type of career would someone interested in chemical reaction have?
Chemical Engineer, materials scientist
What type of career would someone interested in natural selection have?
Biologist, Paleontologists