Vocabulary words
This is a powerful explosive liquid discovered in the 1800s that was dangerous to transport.
Nitroglycerin
This scientist created dynamite and later established famous international prizes.
Alfred Nobel
This is the bright streak of light you see when space rock burns in Earth’s atmosphere.
Meteor
These tiny particles help water droplets form clouds.
Cloud condensation nuclei
Scientists use tools like telescopes to make observations. Why are better tools important for science?
They allow scientists to make more accurate or clearer observations.
This safer explosive was invented by Alfred Nobel by stabilizing nitroglycerin
Dynamite
This scientist created the periodic table and organized elements by their properties.
Dmitri Ivanovich Mendeleev
This is a rock from space that actually lands on Earth.
Meteorite
When light bends as it passes through water or glass, this is called:
refraction
When scientists gather information by watching, measuring, or recording something, this is called making an ________.
Observation
This force allows water to move up tiny spaces in plants or thin tubes.
Capillary action
This astronomer studied meteors and meteor showers and suggested they came from comets.
Giovanni Virginio Schiaparelli
This happens when Earth passes through dust left behind by a comet.
Meteor shower
This number tells how many protons are in an atom.
Atomic number
When scientists test ideas using evidence and observations, they are using this process.
The scientific process (or method)
This chart organizes all known elements by their atomic number.
Periodic table
This astronomer believed he saw canals on Mars through his telescope.
Percival Lowell
Scientists later realized Mars canals were likely this — when the brain sees patterns that aren’t really there.
Optical illusion
This measurement describes how heavy an atom is compared to others.
Atomic weight
Scientists often repeat experiments or observations to make sure their results are this.
Reliable/ accurate/ supported by evidence (any of these is OK)