Font size
WorksheetsQA3.SCIENCE 8
Total questions: 26
Worksheet time: 41mins
Gold and iron pyrite have similar color. Miners can find gold near deposits of iron pyrite. Though they are similar in color and location, they have different properties.
A miner found a 196.75 g of solid substance with a volume of 39.35 cm3. Is the substance gold or iron pyrite? Refer to the image shown.
gold
iron pyrite
neither gold nor iron pyrite
What is the weight of a 60 kg astronaut on earth?
6.12 N
588 N
0.16 N
60 N
What is the volume of the rock?
180 mL
20 mL
30 mL
150 mL
Which of the following is true?
the boiling point of 1 L of water is lower than the boiling point of 3 L of water
the boiling point of water never changes anywhere on earth
the boiling point of 1 L of water is the same as the boiling point of 3 L of water
Which of the following is an example of physical change?
grilling fish
metal stool forming rust
painting a room
fermentation of grapes
Which of the following is an example of chemical change?
boiling egg
hammering gold into thin sheets
evaporating water
melting butter
Which of the following describes a chemical property?
copper conducts electricity
sodium ignites when dropped in water
iron melts at 1 538 degrees Celsius
gold is hammered into thin sheets
This experiment proved that there is a dense nucleus in an atom
Gold Foil experiment
Cathode Ray experiment
flame test
chemical reaction
TRUE or FALSE.
Based from the experiment conducted by Rutherford, when atoms do not have nuclei, the alpha particles would travel straight and would not be deflected
TRUE
FALSE
cannot be determined
Thomson's Cathode Ray Tube experiment prove the existence of _ in an atom
quarks
neutron
proton
electron
Who proposed the atomic model shown on the image?
Dalton
Thomson
Bohr
Rutherford
Who conducted experiments and discovered that atoms contain neutrons?
Chadwick
Dalton
Bohr
Thomson
These subatomic particles made up protons and neutrons
leptons
bosons
quarks
electrons
What element has an atomic number of 33?
(a)
Identify the missing value.
(a)
Identify the mass number of this isotope of gallium.
(a)
These elements spontaneously emit radiation
stable isotopes
radioactive elements
neutral elements
ions
Which of the following is a positively charged ion?
Na atom that emits radiation
Na atom that contains the same number of protons and electrons
Na atom that gains an electron
Na atom that loses an electron
Complete the equation on the image.
Complete the decay equation on the image.
TRUE or FALSE.
Mendeleev arranged the elements according to _
increasing atomic number
increasing atomic mass
physical properties
This element is located in period 7 group 6A
(a)
This element is located in period 3 group 8A
(a)
Which of the following is an alkali metal?
Rb
Tc
Ar
Cl
Which of the following element is a halogen?
Ar
Cu
F
P
Which of the following is an alkaline earth metal?
Na
Br
Kr
Mg
