science exam year eight Flashcards
(24 cards)
What part of the microscope holds the slide in place?
stage clips
What part of the microscope is the handle and is used for holding the microscope when carrying it?
The arm
What part of the microscope acts as a platform to hold the slide?
The stage
Which part of the microscope is the lens at the end of the body tube (which magnifies the specimen by x10?
The eye piece
What part of the microscope is the round dial which is rotated to be able to see the specimen more clearly?
Fine/Coarse focus knob
What part of the microscope is the bottom stand?
The base
What part of the microscope supplies light?
The lamp/illuminator
What part of the microscope rotates to allow different objective lenses to be selected?
The revolving nose piece
Which part of the cell controls and regulates its own activities?
The nucleus
Which part of the cell provides a platform upon which the other organelles may operate?
The cytoplasm
Which part of the cell regulates the materials travelling in and out of the cell?
Cell membrane
Which part of the cell generates most of the chemical energy needed to power the cells biochemical reactions?
The mitochondria
Which part of the cell provides protection and a secure casing?
cell wall
Which part of the cell converts light energy into chemical energy through photosynthesis?
chloroplast
Which part of the cell clears/hides waste?
the vacuole
A type of change where no new substance is formed
physical change
A type of change where a new substance is formed
chemical change
what is a mixture?
a mixture is a combination of molecules where no chemical bond is formed
What is an element
an element is a substance that is present on the periodic table
What is a compound?
a compound is a combination of molecules where there is a chemical bond.
What is the number above the periodic symbol?
the atomic number
what is the number below the symbol?
the average atomic mass
How should you test for carbon dioxide?
by blowing bubbles in lime water (calcium hydroxide)
How should you test for hydrogen?
you should hold a lit match at the mouth of a reaction vessel.
