Math
Which of the following equals -2 - (-4)?
2
Which scientist published the first periodic table in 1869 by arranging elements according to their atomic mass and leaving deliberate gaps for undiscovered elements?
Dmitri Mendeleev
On a Distance-Time graph, a flat, horizontal line segment indicates that the object is:
Standing still
A positive ion formed when an atom loses electrons is a
Cation
The overall pattern or direction (up, down, or flat) in graphed data:
Trend
When evaluating 7 - 3(10 - 4)^2, which operation should be performed first according to the order of operations?
Subtraction inside the parentheses
A material that shatters rather than bending or flattening when struck with a hammer is described as:
Brittle
On a Distance-Time graph, a curved line indicates:
Changing speed
A mixture of metals designed for useful properties is an
Alloy
A testable statement that can be supported or disproved:
Hypothesis
What is the missing number in the product sequence 11 x 37 = 407, 22 x 37 = 814, 33 x 37 = 1221, 44 x 37 = ___?
1628
Which subatomic particle is located outside the nucleus and carries a negative charge?
Electron
Which of the following represents the exact logical opposite of the hypothesis: "As driver age increases, accident risk increases"?
As driver age increases, accident risk decreases or stays the same.
The K in the NPK fertilizer ratio represents
Potassium
Estimating a value beyond the range of known data:
Extrapolation
Estimating a missing value between two known data points on a graph is called:
Interpolation
When an electron absorbs energy and jumps to a higher orbit, the atom is said to be in an:
Excited state
Data downloaded from a Statistics Canada report is classified as:
Secondary data
The pattern of colors produced when an element's light is split by a prism is its
Line spectrum
The variable on the horizontal (x) axis of a distance-time graph:
Time (or Independent variable)
If you collect data by handing out a survey directly to your classmates, what type of data are you using?
Primary data
What happens when an excited electron falls back down to its original lower-energy orbit (ground state)?
It releases energy in the form of light.
What is the value of -15 + (-12) - 4 - (-8)?
-23
The scientist who discovered the neutron in 1932 was
James Chadwick
Primary or Secondary: A researcher calls 100 families to ask how many pets they own.
Primary