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Science topics

Science safety, density and solar system

QuestionAnswer
List five pieces of safety equipment in the laboratory. Fire extinguisher, fire blanket, first aid kit, safety goggles and lab coats.
List five safety rules for when you are working in the laboratory. Safety goggles must been worn, never leave your experiment unattended especially for bunsen burners, no eating and know how to use safety equipment.
When should the following been worn: (a) safety goggles (b) laboratory gloves? Safety goggles must been worn when using dangerous chemicals or a bunsen burner and a lab coat should been worn when using dangerous chemicals.
List three safety rules when using a bunsen burner. Never leave bunsen burner unattended, long hair must be tied back and put safety goggles on.
Why is a blue bunsen burner flame hotter than an orange flame? The blue flame is hotter than the orange one because the one is made out of gas which is hot but the orange flame is colder than the blue one.
Define density. Density is the mass per unit volume.
Name a unit of density. kg/m3 or g/cm3 etc.
Which of the following is not a unit of density? g cm-3, kg/m3, g cm3, kg m-3, g/cm3? g cm-3, g cm3 and kg m-3
What is meant by the term 'the Universe'? The universe describes everything that exists, including stars, planets, galaxies and empty space.
What is 'space'? Space is the empty regions between bodies in the Universe.
What is a galaxy? Galaxies are collections of hundreds of billions of stars.
What is the name of our galaxy? The name of our galaxy is 'The Milky Way'.
What shape is our galaxy? Our galaxy is a spiral galaxy.
Where is our Sun situated in our galaxy? Our Sun is situated on the edge of our galaxy.
How many stars are in our galaxy? There are one hundred billion stars in our galaxy.
What is the name of the galaxy closest to our galaxy? The name of the galaxy closest to our galaxy is the Andromeda galaxy.
How many galaxies are there in the Universe? There are approximately 2 billion galaxies in the Universe.
What are stars? Name three types of stars. A star is a giant ball of hot gas, giving out huge amounts of heat and light and three types of stars are an ordinary star, supergiant and red giant.
How did Copernicus explain the motion of the planets across the night sky? Copernicus explained that the planets had their own orbit but they weren't orbiting anything.
Why is Pluto no longer considered a planet? Pluto is no longer considered a planet because the scientists found out they were actually looking at Charon and Pluto as its moon.
How do we know that there are planets around other stars? How many planets have scientists found so far? We know that there are other planets orbiting stars when the star wobbles and the scientists have found a planet with liquid water orbiting Proxima Centauri.
What is a moon? A moon is a natural satellite orbiting a planet.
How many planets in our solar system have moons? Six planets in our solar system have moons.
Which planet in our solar system has the most moons? Jupiter has the most moons.
Name Jupiter's largest four moons. Jupiter's four largest moons are Ganymede, Callisto, Io and Europa.
What is special about Jupiter's moon Io? Io hits Jupiter with its magnetic field that it got from Jupiter and when it hits Jupiter it creates lightning.
Why might scientists be particularly interested in the moon Europa? Scientists might be interested in that there is liquid ocean underneath the frozen ice on Europa.
What are asteroids? Asteroids are giant rock that float around in space that are too small to be called planets.
Approximately how many asteroids are there in our solar system? Approximately there are a million asteroids in our solar system.
Where are most of the asteroids in our solar system found? Most of our asteroids are found in the asteroid belt in our solar system.
How do scientists believe dinosaurs became extinct? Scientists believe that asteroids wiped the dinosaurs and now they became extinct.
What is a comet? Comets are mixtures of frozen gases, ice, dust and small rocks.
Explain why comets only have tails for a short time in their lives. Comets only have tails for a short time in their lives because as they go closer to the Sun every time they melt a bit.
In which direction do a comet's tails appear? A comet's tail appears to be in the opposite direction to the Sun.
Name the two types of comet tails. The types of tails in a comet are dust and gas tails.
Each time a comet orbits near the Sun, it has slightly less mass than the time before. Why do you think this is? I think it's because that it is melting that makes the mass a little bit lighter.
In 1910, the Earth passed through the tail of Halley's Comet. During that year, spectacular meteor showers were recorded. Suggest a reason why this happened. I think this happened because some of the comet's rock dropped on Earth to create a meteor shower.
What type of star did Jocelyn Bell discover? What did she think it might be at first? Jocelyn Bell discovered a star called a neutron star and I think she thought it was an alien ship.
What are constellations? Name three constellations. Constellations are a group of stars that make a picture, three of them are The Plough, Cassiopeia and Orion constellation.
Name the two lenses used in an astronomical telescope. How do you know how far apart to place them? You know how far apart to place them when the image is sharp.
Describe simply the relationship between the following: The Universe and galaxies. Both have stars.
A galaxy and a star. Both have planets.
Our Sun and the Milky Way Galaxy. Both have planets.
Our Sun and Earth and other planets. Both are in the Milky Way.
The Moon and Earth. The Moon orbits around Earth.
Ganymede and Jupiter. Both close to each other.
Our Sun and asteroids. Both are in the Milky Way.
Our Sun and comets. Both burn.
Constellations and stars. Stars are in constellations.
Created by: anbustudystack
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