L.E UNIT 1
L.E UNIT 2 L2.3
L.E UNIT 2 L 2.3
L.E UNIT 2 L 2.2
100
What are extremophiles?
Organisms that live in extreme environments.
100
Atoms are the basic unit of ____________
matter
100
What are mixtures?
Mixtures are composed of two or more substances which each keep their original properties and do not combine chemically when put together.
100
Does the following experiment support the law of conversation of mass? Why or why not?
Magnesium + Oxygen ------> Magnesium Oxide
46.8g 32.0g 105.9
No because the mass of the product changed. The law of conversation of Mass says that no weight should be lost.
200
What are the 7 characteristics of life?
Reproduce, respond to stimuli, metabolism, homeostasis, genetic material and growth
200
What is matter?
Matter is anything that occupies space and holds weight.
200
True or false-
Protons are negatively charged and electrons are positively charged.
False!
Protons are positively charged and electrons are negatively charged.
200
What is photosynthesis?
Photosynthesis is a chemical reaction that happens when plants take in carbon dioxide, water and sunlight then converts it to glucose and oxygen.
300
What is one thing that plant cells have that animals cell do not?
Cell wall
300
Explain the difference between atoms and molecules.
Molecules form when atoms are chemically joined together however, atoms are the basic unit of a chemical element.
300
The nucleus atoms are made up of ______________
Protons and neutrons
300
Where do trees obtain their mass from?
The mass of trees is primarily carbon
400
Which type of cell came first Prokaryotes or Eukaryotes?
Prokaryotes- they are the simplest form of a cell and the oldest. Eukaryotes evolved from prokaryotes.
400
True or false-
Atoms are building blocks. If you want to build molecules, you will need atoms of different elements.
True
400
What orbits around the nucleus of an atom?
Neutrons
400
What is chlorophyll and where can it be found?
It is found inside the chloroplast and it is what gives the leafs the color. During photosynthesis it helps the plants absorbs energy and get nutrients from sunlight.
500
Which organelle in the cell is "a complex organelle that converts energy from food into a form that the cell can use"
The mitochondria also known as the power house of the cell
500
Explain the difference between a molecules of compound and molecules of element.
Compounds are molecules that have more than one type of atom chemically combined however, all of its atoms are NOT THE SAME. Elements are have many of the SAME atoms joined together.
500
During a chemical reaction, atoms are rearranged, but the total number of atoms of each element remains the same. One way we can prove this is by measuring the mass of the reactants and the mass of the products, which are equal. This is called __________________________________.
The law of conservation of Mass
500
What is the process of animals obtaining energy from plants called?
Animals use energy from plants by a process called Cellular respiration.