7th Science Unit 1 Test Flash Cards
All living things are made up of ____________.
Cells
Diffusion is a type of _______________ transport.
Passive
Active transport uses a cells own ____________.
Energy
What is the total magnification of a microscope with two lenses where one lens has a magnification of 10, and the other lens has a magnification of 40?
400 (10 x 40 = 400)
What is the function of a cell membrane?
To control what enters and leaves a cell.
What organelle is the control center (brain) of the cell?
Nucleus
Which organelles produce most of the energy needed by the cell?
Mitochondria
Which organelles produce proteins in the cell?
Ribosomes
What is the movement of the molecules from an area of higher concentration to an area of lower concentration?
Diffusion
What is the movement of water molecules through a selectively permeable membrane called?
Osmosis
What type of transport moves materials through a cell membrane WITHOUT using energy?
Passive Transport
What type of transport moves materials through a cell membrane when energy IS required?
Active Transport
What is the function of the cell wall?
To protect and support the cell.
Which organelle stores food and other materials needed by the cell?
Vacuole
Active transport occurs when_______ is used to move substances through a membrane.
Energy
The passive transport of water through a membrane is ______.
Osmosis
TRUE OR FALSE: A microscope is an instrument that makes small objects look smaller.
False; it makes small objects look bigger.
TRUE OR FALSE:
The outer boundary of the animal cell is the cell membrane?
True
TRUE OR FALSE
Organelles that use energy from sunlight to produce energy are called chloroplasts.
True
TRUE OR FALSE
In passive transport, materials move from a higher concentration to lower concentration through a cell membrane.
TRUE
The structure that allows materials to pass into and out of a cell is the...
Cell Membrane
Small grain like bodies called _______ produce proteins inside cells.
Ribosomes
Organelles known as _______ contain chemicals that break down food particles and old cell parts.
Lysosomes
Two structures found in a plant but not in animal cells are the _____________ & ___________________.
Cell Wall & Chloroplasts
The diffusion of______molocules is called osmosis.
Water
Known as the "powerhouse", it converts energy in food to energy the cell can use.
Mitochondria
Stores water, food, or wastes and is larger in a plant cell than in an animal cell.
Vacuole
The "brain" of the cell which controls cell activities.
Nucleus
Found only in plant cells, it gives support and protection to the cell.
Cell Wall
Like a warehouse because it receives and packages proteins and other materials.
Golgi Apparatus
A system of tubes found around the nucleus that transports materials.
Endoplasmic Reticulum (ER)
A jello-like substance that holds all the other organelles in place.
Cytoplasm
A grain shaped organelle that produces proteins and can be found attached to the ER.
Ribosomes
An organelle only found in plant cells that capture sunlight for photosynthesis.
Chloroplasts
The job of this organelle is to break down materials for the cell.
Lysosome
Found in both plant and animal cells, this organelle allows certain things to enter and leave the cell.
Cell membrane
Identify the observation as Quantitative, Qualitative, or Both.
The cat is 15 inches tall from the tip of his ears to the bottom of his feet.
Quantitative
Identify the observation as Quantitative, Qualitative, or Both.
Stoplights can be red, green, or yellow.
Qualitative
Identify the observation as Quantitative, Qualitative, or Both.
The temperature outside was 98 degrees.
Quantitative
Identify the observation as Quantitative, Qualitative, or Both.
The team had purple jerseys.
Qualitative
Identify the observation as Quantitative, Qualitative, or Both.
The dry purple paint was smeared 1 foot on the white paper.
Both
What are the three components of cell theory?
All living organisms are composed of cells.
Cells are the basic unit of structure and function in living organisms.
All cells come from pre-existing cells.