Science 1
What are the three main types of elements?
Metals, non-metals and metalloids
The formula for calculating average speed is
Speed = distance / time
This category of elements is brittle, dull, and a poor conductor of heat and electricity
The horizontal rows on the periodic table are called
periods
The long-term average of temperature, precipitation, and other weather conditions in a region is called
Climate
This type of succession occurs in areas where an ecosystem previously existed but was disturbed
Secondary succession
How many total atoms are in H₂O
3 total atoms (2 hydrogen, 1 oxygen)
This type of succession occurs on bare rock, such as after a volcanic eruption
Primary succession
If a car travels 100 km in 2 hours, what is its average speed?
50 km/hr
This type of front forms when a cold air mass moves in and forces a warm air mass upward, often bringing thunderstorms and cooler temperatures.
Cold front
The subscript in a chemical formula tells you this
The number of atoms present
The element Na represents this metal...
Sodium
These boundaries between different air masses can cause changes in temperature, precipitation, and storms
Weather fronts
How many oxygen atoms are in 5CO₂
10 oxygen atoms (5 x 2= 10)
Newton’s First Law states that an object in motion stays in motion unless acted upon by an outside force. It is also called ___
Law of inertia
These gases trap heat in Earth’s atmosphere, contributing to global warming. Examples include carbon dioxide and methane
Greenhouse gases
A rocket launches into space because the force of the exhaust pushing downward creates an equal force pushing upward. This demonstrates which of Newton’s laws?
Newtons third law
Newton’s Second Law states that force equals mass times ___
Acceleration
As you move left to right across a period, the atomic number
Increases
Most metals are good conductors of this form of energy
Electricity
When is the science STAAR test?
April 16th
Good Luck :)
A 10 kg object is pushed with a force of 50 N. What is its acceleration?
5 m/s²
(F = ma → 50 N ÷ 10 kg = 5 m/s²)
How many sulfur atoms are in Al₂(SO₄)₃?
3 sulfur atoms
After a forest fire, grasses and small plants begin to grow before larger trees return. This is an example of
Secondary succession
A train travels 240 miles in 4 hours and then 360 miles in the next 6 hours. What is its overall average speed?
60 mph
(600 miles ÷ 10 hours)