Homework 25th March

Homework 25th March
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Slide 1: Slide
ScienceLower Secondary (Key Stage 3)

This lesson contains 41 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 30 min

Items in this lesson

Homework 25th March

Slide 1 - Slide

What is potential difference?
A
The resistance in a circuit
B
The flow of current
C
The amount of charge
D
The work done per unit charge

Slide 2 - Quiz

How is potential difference measured?
A
In amperes (A)
B
In ohms (Ω)
C
In coulombs (C)
D
In volts (V)

Slide 3 - Quiz

What is the potential difference across a resistor with 2 ohms and a current of 3 amperes?
A
9 volts
B
7 volts
C
5 volts
D
6 volts

Slide 4 - Quiz

How does potential difference affect current in a circuit?
A
Potential difference only affects resistance
B
Potential difference has no effect on current
C
Higher potential difference leads to lower current
D
Higher potential difference leads to higher current

Slide 5 - Quiz

What is the formula for potential difference in a circuit?
A
Potential difference = Current × Resistance
B
Potential difference = Current ÷ Resistance
C
Potential difference = Resistance ÷ Current
D
Potential difference = Current + Resistance

Slide 6 - Quiz

What is the symbol used in electrical circuits to represent current?
A
R
B
I
C
V
D
A

Slide 7 - Quiz

Which unit is used to measure electric current?
A
Ampere
B
Volt
C
Ohm
D
Watt

Slide 8 - Quiz

In which direction does conventional current flow?
A
From positive to negative
B
In both directions
C
From negative to positive
D
It depends

Slide 9 - Quiz

What does DC stand for in relation to electric current?
A
Dynamic current
B
Digital current
C
Direct current
D
Decelerating current

Slide 10 - Quiz

What material is commonly used as a conductor of electric current?
A
Copper
B
Aluminum
C
Gold
D
Silver

Slide 11 - Quiz

What is the formula for potential difference in a circuit?
A
Potential difference = Current × Resistance
B
Potential difference = Current ÷ Resistance
C
Potential difference = Resistance ÷ Current
D
Potential difference = Current + Resistance

Slide 12 - Quiz

What is the definition of an independent variable?
A
The variable that is constant.
B
The variable that is controlled.
C
The variable that is measured.
D
The variable that is manipulated or changed.

Slide 13 - Quiz

In a study investigating the impact of exercise on heart rate, what would be the independent variable?
A
The amount of exercise performed.
B
The age of the participants.
C
The heart rate measurement.
D
The duration of the study.

Slide 14 - Quiz

Which statement best describes the role of an independent variable in an experiment?
A
It is the variable that is measured.
B
It is the variable that is changed to observe its effect.
C
It is the variable that remains constant.
D
It is the variable that is controlled.

Slide 15 - Quiz

What makes an independent variable different from a dependent variable?
A
It is influenced by the independent variable.
B
It is manipulated by the researcher.
C
It is the outcome being measured.
D
It is a constant in the experiment.

Slide 16 - Quiz

What is the purpose of a resistor in an electrical circuit?
A
Storing electrical energy
B
Converting electrical energy to heat
C
Increasing the flow of electrical current
D
Limiting the flow of electrical current

Slide 17 - Quiz

What is the unit of measurement for resistance?
A
Ampere
B
Ohm
C
Volt
D
Watt

Slide 18 - Quiz

Which of the following materials is commonly used to make resistors?
A
Aluminum
B
Silver
C
Copper
D
Carbon

Slide 19 - Quiz

What happens to the current in a circuit when the resistance increases?
A
The current increases
B
The current decreases
C
The current remains the same
D
The current becomes erratic

Slide 20 - Quiz

What type of bonding involves the transfer of electrons between a metal and a non-metal?
A
Covalent bonding
B
Ionic bonding
C
Hydrogen bonding
D
Metallic bonding

Slide 21 - Quiz

In ionic bonding, what is the name for the positively charged ion formed by losing electrons?
A
Cation
B
Isotope
C
Anion
D
Neutron

Slide 22 - Quiz

Which of the following pairs typically form an ionic bond: sodium and chlorine, or hydrogen and oxygen?
A
Helium and neon
B
Sodium and chlorine
C
Carbon and nitrogen
D
Hydrogen and oxygen

Slide 23 - Quiz

What is the term for the attraction between oppositely charged ions in an ionic bond?
A
Van der Waals force
B
Electrostatic attraction
C
London dispersion
D
Dipole-dipole interaction

Slide 24 - Quiz

In an ionic bond, what is the name for the negatively charged ion formed by gaining electrons?
A
Isomer
B
Proton
C
Cation
D
Anion

Slide 25 - Quiz

What is the formula for potential difference in a circuit?
A
Potential difference = Current × Resistance
B
Potential difference = Current ÷ Resistance
C
Potential difference = Resistance ÷ Current
D
Potential difference = Current + Resistance

Slide 26 - Quiz

What type of bonding involves the sharing of delocalized electrons among a lattice of metal ions?
A
Hydrogen bonding
B
Ionic bonding
C
Covalent bonding
D
Metallic bonding

Slide 27 - Quiz

What is the primary force that holds the metal atoms together in metallic bonding?
A
London dispersion forces
B
Dipole-dipole interactions
C
Electrostatic attraction
D
Van der Waals forces

Slide 28 - Quiz

Why do metals typically have high electrical conductivity?
A
Presence of delocalized electrons
B
Formation of covalent bonds
C
Lack of valence electrons
D
Absence of free electrons

Slide 29 - Quiz

What is the sharing of electron pairs between atoms called?
A
Covalent bonding
B
Metallic bonding
C
Ionic bonding
D
Hydrogen bonding

Slide 30 - Quiz

What type of elements typically form covalent bonds?
A
Metalloids
B
Nonmetals
C
Alkali metals
D
Noble gases

Slide 31 - Quiz

In a covalent bond, what holds the atoms together?
A
Protons
B
Ionic charges
C
Neutrons
D
Shared electrons

Slide 32 - Quiz

Slide 33 - Slide

Slide 34 - Slide

Slide 35 - Slide

When will Europa Clipper launch?
A
July
B
August
C
September
D
October

Slide 36 - Quiz

When will Europa Clipper arrive at its destination
A
2025
B
2030
C
2035
D
2040

Slide 37 - Quiz

How many experiments will Europa Clipper undertake?
A
10
B
11
C
12
D
14

Slide 38 - Quiz

What does SUDA stand for?
A
Space Undertaking Dust Analysis
B
Surface Uropa Dust Analyser
C
SUrface Dust Analyser
D
South underside Dust analysis

Slide 39 - Quiz

What is SUDA
A
A mass spectrometer
B
A flame spectroscopy

Slide 40 - Quiz

What will SUDA do?
A
Take photographs and send the to Earth
B
Identify chemicals and materials present on the moon.
C
Collect material ejected from the moon and bring home
D
Reveal the chemical composition of material ejected from the moon

Slide 41 - Quiz