WorksheetsCBA test corrections
Total questions: 27
Worksheet time: 15mins
Giants
Supergiants
Main-sequence
White Dwarfs
The atoms of a certain element each have 35 protons and 7 valence electrons. Which statement correctly identifies this element and describes its chemical reactivity?
The element is chlorine, and it is not very reactive.
The element is bromine, and it is stable.
The element is chlorine, and it is highly reactive
The element is bromine, and it is highly reactive.
8
3
4
8
24
Arsenic
Beryllium
Germanium
Helium
A student uses a baseball bat to hit a resting 0.143 kg baseball. The bat exerts a force of 152.4 N, which causes the ball to begin moving, What is the acceleration of the ball when it begins to move?
1065.73 m/s/s
21.79 m/s/s
1.07 m/s/s
.94x10^3 m/s/s
Which of the following best describes the velocity of an object?
65 m north
65 m/s
65 m/s north
65 m/s/s
The universe has many different components. Which list places four components of the universe in the most likely order from largest to smallest?
Galaxies, stars, planets, nebulae
Galaxies, nebulae, stars, planets
Nebulae, stars, planets, galaxies
Planets, stars, nebulae, galaxies
Sedan
SUV
Truck
RV
Strontium is the most reactive because it has the most protons.
Oxygen is the most reactive because it has equal numbers of protons and electrons.
Sodium is the most reactive because it has one electron in its outermost shell.
Strontium and Iodine have similar reactivity because they are in the same period.
1 and 3
3 and 4
2 and 3
2 and 4
He will rise faster
he will drop faster to the ground
His downward motion will stop
His motion will be constant
(a)
W
X
Y
Z
Which statement accurately describes the atoms of a specific element?
A cobalt, Co, atom contains 59 protons and 27 neutrons.
A strontium, Sr, atom contains 88 electrons outside the nucleus and 38 neutrons inside the nucleus.
A cadmium, Cd, atom contains 48 protons in the nucleus and 48 electrons outside the nucleus.
A sulfur, S, atom contains 16 protons and 16 electrons outside the nucleus.
electrical energy > heat energy > mechanical energy
nuclear energy > heat energy > mechanical energy > electrical energy
nuclear energy > heat energy > electrical energy
mechanical energy > heat and electrical energy
The cart was at rest between 15 s and 20 s.
The cart accelerated away from the starting point for 15 s.
The cart moved at a speed of 6 m/s between 20 s and 25 s.
The cart maintained a constant speed between 25 s and 30 s.
71 N
4,903 N
0.2 x 10^-3 N
590 N
Why does Earth get more energy from the sun than from all the other stars in the universe combined?
The sun is much larger than the other stars.
The sun is much closer than the other stars.
The sun is much hotter than the other stars.
The sun is much more dense than the other stars.
I and III
II and IV
III and IV
III and V
A solid consisting of clear crystals is combined with a red liquid in a container, and the following observations are obtained:
-The color of the liquid changed from red to purple.
-The solid got smaller.
-The solution temperature changed from 25°C to 30°C.
-Bubbles formed in the container.
How many of the listed observations indicate a new substance was formed?
1
2
3
4
Sirius B
Spica
Pollux
Proxima Centauri
Just type the acceleration number(no unit of measure)
(a)
Which direction will the boat accelerate?
Forward
Backward
Up
Down
Identify the element
Sodium
Fluorine
Chlorine
Lithium
Describe the reactivity of this element
Very reactive
Not reactive
Inert
Stable
Pick elements with similar reactivity
Chlorine
Bromine
Iodine
Neon
