WorksheetsFinal review Physical Science
Total questions: 15
Worksheet time: 30mins
A man jogs at a velocity of 2.5 m/s west for 1,200 s. He then walks at a velocity of 1.0 m/s east for 500 s and then stops to rest. What is the displacement of the man when he stops to rest?
3,500 m west
3,000 m west
2,500 m west
700 m west
The graph below shows the motion of four cars.
Based on the graph, which statement about all the cars is true?
They are moving at a constant speed.
They are changing their speed during travel.
They are slowing down.
They are stopped.
As the wheels of a train move along the train tracks, what type of friction exists between the wheels and the tracks?
fluid friction
rolling friction
sliding friction
static friction
A child fills a bucket with salt water and sand. How are the contents of the bucket classified?
a solution
a compound
a homogeneous mixture
a heterogeneous mixture
This diagram shows a 40-kg object being pulled in one direction while friction acts on it in the opposite direction.
What is the net force on the object?
160 N
140 N
120 N
20 N
Which element is classified as a metal?
boron (B)
antimony (Sb)
phosphorus (P)
cadmium (Cd)
Four different liquids will be separately poured into a single beaker. The liquids are ethanol, milk, oil, and water. The density for each liquid at room temperature is listed in the table below.
How will the liquids be arranged from bottom to top in the beaker?
milk, water, oil, ethanol
milk, water, ethanol, oil
water, milk, oil, ethanol
water, oil, ethanol, milk
The diagram below is the Bohr model of an atom.
Which best describes this atom?
It has 6 electrons.
It has a positive charge.
It has 6 valence electrons.
It has a full outermost energy level.
Which diagram correctly shows how electrically charged balls will act?
A
B
C
D
What type of bond will form when an element from group 2 (IIA) bonds with an element from group 17 (VIIA)?
hydrogen bond
covalent bond
metallic bond
ionic bond
A 100-gram sample of cerium-143 has a half-life of 33 hours. How long will it take until there are only 6.25 grams of cerium-143 left?
66 hours
99 hours
132 hours
165 hours
Thallium-208 has a half-life of 3 minutes. How long will it take 60.0 g of thallium-208 to decay so that 15.0 g of the thallium-208 remains?
3 minutes
6 minutes
9 minutes
12 minutes
Which of these elements is the most chemically reactive?
beryllium (Be)
calcium (Ca)
strontium (Sr)
radium (Ra)
Electrons are being shared between atoms in a certain compound. Which elements could most likely form this compound?
lithium (Li) and fluorine (F)
aluminum (Al) and iodine (I)
sulfur (S) and oxygen (O)
iron (Fe) and chlorine (Cl)
How many valence electrons are in a neutral atom of nitrogen (N)?
2
3
5
15
