Unit 2
Measured as g/cm3 or g/mL
What is Density?
Made of only one type of element or compound and cannot be separated by physical means
What is a pure substance?
These are the two main reactants needed for cellular respiration to occur
What is glucose and oxygen?
This motion of earth causes day and night, and this other motion causes the length of the year
What are rotation and revolution?
A year with 366 days to keep the calendars aligned with Earth's orbit around the sun
What is a leap year?
The total kinetic energy from a random motion
What is Thermal Energy?
A logarithmic scale from 0 to 14 that measures how acidic or basic a water-based solution is
What is the pH scale?
These structures are found in plant cells but not animal cells and are responsible for photosynthesis
What are chloroplasts?
It takes this long to cycle through the phases of the moon
What is 29.5 days?
This is the reason why we always see the same side of the Moon from Earth
What is the Moon rotates at the same rate that it revolves around earth?
Contains a dense, central nucleus (containing positive protons and neutral neutrons) and orbiting negative electrons
What is an atom?
A chemical process that releases energy, usually as heat or light, into its surroundings, making things warmer
What is an Exothermic Reaction?
The molecule that cells use as their main source of energy
What is ATP?
These two words describe the darkest part and the lighter part of a shadow during an eclipse
What is the umbra and penumbra?
When the northern Hemisphere is tilted away from the sun and the southern is tilted towards the sun.
What is winter?
Plasma to Gas
What is Deionization?
a chemical bond formed when one atom transfers one or more electrons to another atom (typically from a metal to a non metal)
What is Ionic Bonding?
When cells make energy without using oxygen
What is anaerobic respiration?
These tides occur when the Sun, Moon, and Earth form a right angle and start to produce a small difference between high and low tides
What are neap tides?
When the right side of the moon is it up
What is waxing?
The object that weighs 0.9 g/ml3 does this in pure water.
What is floating?
Increasing a solvent capacity, usually by heating the solution
What is dissolving extra solutes?
This is the equation for photosynthesis
What is carbon dioxide + water -> glucose + oxygen?
This type of eclipse happens when the Moon is directly between the Sun and Earth, and this is the position of the three planets
What is a solar eclipse, and what is Sun-Moon-Earth?