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WorksheetsELITE 8 EOT2
Total questions: 38
Worksheet time: 19mins
Whyis part B flat?
The added energy is The particles are overcoming the attractions of between particles
The potential energy of the paricles is increaseing
The particles are losing energy
The energy is constant
Explain why a steel block sinks and a ship floats.
They will both sink
They will both float
The steel block has less density than the water.
The ship's hull has air. This makes the density of the ship less than the water.
Name a machine that works in accordance with Pascal's Law.
Screwdriver
Escalator
Hydraulic
Kettle
Atmospheric pressure at sea level is about 101kPa. With how much force does the Earth’s Atmosphere push on an average human being at sea level. Assume the surface area of an average human is 1.80m
F=PxA
180,000 N
F = P/A
1.78 N
Atmospheric pressure at sea level is about 101kPa. With how much force does the Earth’s Atmosphere push on an average elephant being at sea level. Assume the surface area of an average elephant is 18.m
F=PxA
=
1,818 N
F = P/A
1.78 N
F=PxA
=
1,818,000 N
A car weighs 15,000 N and it’s tires are inflated to a pressure of 190kPA. How large is the area of the car?
A=FXP
= 15000x190
=2850000 M
A = F/P
= 15000 / 190
=78.94M
A = F / P
= 15000 / 190000
= 0.079
A car weighs 19,000 N and it’s tires are inflated to a pressure of 210kPA. How large is the area of the car?
A = F/P
= 19000/ 210
=90.4
A = F / P
= 19,000 / 210,000
= 0.09
A = F X P
=190000 x 210
=
3,990,000
How does pressure change when the velocity (speed) of a fluid increases?
Increase
Stay the same
Decrease
How does pressure change when the velocity (speed) of a fluid DECREASES?
Increase
Stay the same
Decrease
At constant temperature, an increase to the pressure of gas causes the volume to
Decrease
Stay the same
Increase or decrease
Increase
At constant temperature, a DECREASE to the pressure of gas causes the volume to
Decrease
Stay the same
Increase or decrease
Increase
What is the volume of gas(L) when the pressure is 300kPa?
2
4
3
5
What is the volume of gas(L) when the pressure is 250 kPa?
2
4
3
5
Which concept does this graph represent?
Charles
Pascal
Boyle
Bernoullie
Use CHARLES LAW: A 2.0L balloon at room temperature (293k) is placed in a refrigerator at 276k. What is the volume of the balloon after it cools in the refrigerator.
2 x (293/276)
=
2.1L
2 x (273/293)
=
1.9L
Use CHARLES LAW: A 3.0L balloon at room temperature (293k) is placed in a refrigerator at 212k. What is the volume of the balloon after it cools in the refrigerator.
3 x (293/215)
=
4 L
3 x (215/293)
=
2.2 L
Why is Titanium used in a variety of applications?
Flexible and dense
Strong and brittle
Lightweight and flexible
Strong and Lightweight
Which are properties of colloids , chose 2 answers.
Heterogenous mixtures
Parts can't be easily seen,
Homegenous mixture
Parts can be easily seen.
Which are properties of suspensions, chose 2 answers.
Heterogenous mixtures
Parts can't be easily seen,
Homegenous mixture
Parts can be easily seen.
Why are some medicines stored in dark colored bottles?
To absorb heat
to stop light from getting in and reacting with the medicine
Because they are always dark color
To block radiation.
The difference between the Bohr model and the electron cloud model.
(two answers)
Electron cloud model states that electrons are found in an area around the nucleaus.
Bohr model states that electrons are found in an area around the nucleaus.
Bohr model states that electrons are in a fixed position.
Bohr model states that electrons are in a fixed position.
Explain how Mendeleev was able to predict the properties of elements that had not yet been discovered.
He studied the properties of the surrounding atom to find a pattern.
He studied their atomic mass
Which two things did mendeleve do to organize the periodic table?
Arranged atoms by increasing atomic mass,
Arranged the periodic table by physical properties only
Arranged the periodic table by number of electons
Used the chemical and phycial proerties to put the atoms into columns
Explain the steps involved in the process of distillation?
Vapourisation -> condensation -> heating -> cooling.
Heating -> condensation -> vaporisation -> cooling
cooling->
Heating -> vaporization -> condensation -> .
Heating -> vaporization -> condensation -> cooling.
What are Isotopes?
Atoms of the same element with a different number of ELECTRONS
Atoms of the same element with a different number of NEUTRONS
Atoms of the same element with a different number of PROTONS
Atoms of the same element with a different number of ENERGY SHELLS
When sodium reacts with chlorine, the only product is Sodium Chloride (salt) . If 25g of hydrogen react completely with 275g of chlorine, how many grams of salt are formed.
6875 g
250 g
300g
11 g
Compare the isotopes of Carbon 14 and Carbon 15.
Carbon 14 has 14 electrons Carbon 15 has 15 electrons
Carbon 14 has 14 neutrons and Carbon 15 has 15 Neutrons
Carbon 14 has 14 Protons and Carbon 15 has 15 Protons
They have different number or protons and neutrons
When a metal is hammered into a sheet, it does not break. Why?
Because the layers slide past One another without losing their attraction
Beacuse metals are brittle
Becuase the bond are very strong and the ions don't move.
Because metals are ductile.
Explain how knoledge of properties of Alkali metal can help us determine how it should be stored.
Alkali metals are stable and don't need to be stored in special contaiers
Alkali metals have very small reactions with oxygen, they should be stored in dark bottles
Alkali metals react violently with oxygen and water, they should be stored in oil
They react vilontly with oxygen. they should be stored in water
Explain how interactions of electric charges account for the reactivity of Alkali Metals.
Atoms in the Alkali metals have 1 electron on thier outer shell (valence) which is lost when combined with non-metal
Atoms in the Alkali metals have 7 electron on thier outer shell (valence)
The form Covalent bonds
Explain how the location of Alkali metlas is related to the number of electrons.
They are in group 2 of the periodic table, Each atom has 2 valence electrons.
They are in group 3 of the periodic table, Each atom has 1 valence electrons.
They are in group 7 of the periodic table, Each atom has 7 valence electrons.
They are in group 1 of the periodic table, Each atom has 1 valence electrons.
2 types of bondin in NON-METALS
Covalent and metallic
Covalent and ionic
Ionic and metallic
Ionic only
Define allotropes:
Elrmrnts with same number of valence electrons
Same element with different number of neutrons
Different structural forms of the same element.
How do you define plasma state
Plasma is matter that has enough energy to oversome the attractive forces between it's particles
A matter where some protons have been stripped away from thier atoms.
Explain what periods and groups in a periodic table are
Periods show the number of energy shells. Groups show how many valence electrons they have.
Groups show the number of energy shells. Periods show how many valence electrons they have.
What are the properties which help us identify a halogen?
They are always gas
They are good conductors of electricity
Halogens form reactive molecules with the following colours.
Chlorine – - yellow
Bromine – red
Iodine - dark brown
Like other metals, halogens can conduct electricity or heat
Define transuranium elements and describe their properties.
Atoms that have more than 20 protons
Atoms that have more than 80 protons
Atoms that have more than 78 protons
Atoms that have more than 92 protons
A certain atom has 22 protons , 22 electrons and 20 neutrons. What is the mass number?
40
42
62
2
